General Terms and Conditions

1.1. These General Terms and Conditions (hereinafter referred to as GTC) apply to the online invoicing service available through the kontozz.hu website operated by Syneo International Limited Liability Company ( registered office: 9700 Szombathely, Kürtös utca 5., company registration number: 18 09 115488, tax number: 32173394-2-18, hereinafter referred to as: Service Provider) through the kontozz.hu website .

1.2. The purpose of these GTC is to set out in a transparent and comprehensible manner the rights and obligations between the Service Provider and users ( hereinafter: User or Customer), the terms and conditions of use of the Service, and the rules for concluding, amending, and terminating contracts.

1.3. The Service is only available online, via a browser, at www.kontozz.hu / kontozz.hu. The Service Provider does not currently offer a mobile app.

The Service is available in Hungarian and English, and is primarily intended for businesses and sole traders based in Hungary.

1.4. In order to use the Service, the User must register with the kontozz.hu system, accept the GTC and the Service Provider's Data Management Policy, and have the technical requirements necessary for use (internet connection, appropriate browser, etc.).

1.5. By accepting the GTC, a contract is concluded between the User and the Service Provider by electronic means, which does not qualify as a written contract but has all the legal effects of one.

The contract is valid for an indefinite period and remains valid until the User's registration is deleted or the service is terminated.

2. Definitions

For the purposes of these GTC, the following terms shall have the meanings set forth herein:

● Service provider: Syneo International Kft., as the operator of the kontozz.hu website and the online invoicing system.

● Service: the online billing system provided by the Service Provider and accessible via the Internet, along with all related functions (e.g., invoice issuance, partner data management, reports).

● Website: the online interface available at the domain www.kontozz.hu.

● User: any natural person, sole trader or representative of a legal entity who registers with the kontozz.hu system and uses the Service.

● Customer Account: the online user account created during registration, through which the User accesses the Service.

● Subscription package: a service package offered by the Service Provider with specific content and pricing.

● Subscription fee: the fee payable by the Customer for using the given Subscription package.

● Data Processing Notice: a separate document of the Service Provider containing the rules for the processing of personal data (available at www.kontozz.hu ).

● Civil Code: Act V of 2013 on the Civil Code.

● GTC: this General Terms and Conditions document.

3. Conditions for using the Service and rules for registration

3.1. Registration

3.1.1. In order to use the kontozz.hu online invoicing service, the User must first register on the website.

During registration, the User is required to provide accurate information, in particular: their name, email address, billing information, and – if acting on behalf of a legal entity – their power of representation.

3.1.2. As a result of registration, a Customer Account is created, which the User can access with a unique email address and password.

The Service Provider is entitled to refuse registration if there are reasonable grounds to believe that the data provided is false or that the purpose of registration is to use the service for purposes other than those intended.

3.1.3. To finalize registration, the User must confirm the link provided in the email sent by the system.

By confirming registration, the User accepts these GTC and the Service Provider's Data Management Policy.

3.2. Account types and user permissions

3.2.1. In the kontozz.hu system, a Customer Account may have multiple user roles:

● Admin – the person who creates the registration and has full access.

● Assistant – a person invited by the Account Holder whose access rights may be restricted.

● Accountant – a person invited by the Client who may access the account data for accounting purposes but does not have access to all functions.

3.2.2. The Account Owner is responsible for ensuring that persons with access to the account are authorized to use the system and is obliged to immediately terminate any outdated or unauthorized access.

3.3. Subscription packages

3.3.1. The Service Provider offers the following subscription plans:

● Kontozz Free – a completely free package designed for unlimited use, which includes basic invoicing functions.

● Kontozz Basic – available with extended features for a subscription fee.

● Kontozz Basic + Dr.CRM – a package related to Kontozz Basic that also includes a customer relationship management module.

● Kontozz Pro – the package offering the most comprehensive functionality, primarily for larger businesses.

The detailed contents of the packages and current pricing are always available on the website www.kontozz.hu.

3.3.2. The Service Provider reserves the right to modify subscription fees, functions, and package names.

The changes will only affect existing subscriptions from the next renewal cycle onwards.

Users will be notified of the change by email or via a notification within their account.

3.3.3. The Service Provider reserves the right to modify or terminate the terms, features, or availability of the Kontozz Free package at any time without prior notice.

The Service Provider does not guarantee the preservation and availability of data stored in the Free package after the termination of the service.

3.4. General terms and conditions for using the service

3.4.1. A prerequisite for using the Service is the use of an appropriate Internet connection and browser. The Service Provider publishes the technical requirements on its website.

3.4.2. The User shall use the Service exclusively for lawful purposes and in accordance with the principle of good faith.

It is prohibited to use the Service in any way that jeopardizes the security or operation of the system or the data of other users.

3.4.3. The Service Provider shall be entitled to restrict or suspend access to the Service if the User violates the GTC or misuses the Service.

3.5. Deleting your registration

3.5.1. The User may request the deletion of their Customer Account at any time by contacting customer service or through the account settings.

Cancellation will result in the termination of the contract for use of the Service.

3.5.2. The Service Provider is entitled to delete the Customer Account if:

● the information provided during registration is false,

● the account has been inactive for 12 months,

● the User seriously violates the GTC, or

● the User engages in unlawful activity within the scope of the Service.

3.5.3. Following deletion, the Service Provider shall process personal data in accordance with the retention rules set out in the Data Processing Notice.

4. Content and technical operation of the Service

4.1. General description of the Service

4.1.1. kontozz.hu is a cloud-based online invoicing system accessible via a web browser, which allows Users to issue electronic invoices, manage their customers and partners, and handle related documents.

4.1.2. The purpose of the Service is to provide businesses and sole traders with an up-to-date and secure invoicing solution that complies with Hungarian tax and accounting regulations.

The Service Provider shall ensure that the system complies with the relevant legislation, in particular Act CXXVII of 2007 on Value Added Tax and the requirements of the National Tax and Customs Administration (NAV) for online data reporting.

4.1.3. The Service Provider shall ensure technical connectivity with the NAV Online Invoice system, however, the Service shall only enable the transmission of data. The Service Provider shall not be liable for any failure to transmit data or any NAV error due to incorrect or incomplete data provided by the User.

4.2. Availability and operation of the Service

4.2.1. The Service is available on the Internet via the website www.kontozz.hu; no installation or local software is required.

The User accesses their Customer Account via their own device and browser.

4.2.2. The Service Provider strives to ensure the continuous, uninterrupted operation of the Service, but does not guarantee 100% availability of the system.

The Service Provider shall inform Users in advance about planned maintenance on the website or by email.

4.2.3. The Service Provider is entitled to periodically restrict or suspend the Service:

● system maintenance,

● development or update,

● or in the event of unavoidable external circumstances (force majeure).

The Service Provider shall endeavor to announce such downtime in advance and to limit it to the shortest possible time.

4.3. Updates and improvements

4.3.1. The Service Provider shall be entitled to modify or expand the content, functions, appearance, and operation of the Service from time to time in order to ensure that the system complies with technological and legal changes, as well as the needs of Users.

4.3.2. Updates and improvements are applied automatically, without requiring separate approval from the User.

The Service Provider shall make every effort to ensure that these changes do not cause any service interruption or data loss.

4.3.3. The Service Provider reserves the right to make certain new features available only to Users of paid packages, and to modify or discontinue previous features if they become obsolete.

4.4. Data security and retention

4.4.1. The Service Provider stores the data uploaded, recorded, or created by the User on secure servers and ensures that regular backups are made.

4.4.2. The Service Provider shall process the User's data solely for the purpose of providing the Service and complying with applicable laws, in accordance with the provisions of the current Data Processing Policy.

4.4.3. The Service Provider shall take all reasonable technical and organizational measures to protect User data (e.g., encrypted connection, password protection, access restriction).

However, the User is responsible for the security of their own login details and for sharing them with third parties.

4.4.4. The Service Provider does not perform digital archiving in a manner certified in accordance with Decree 1/2018. (VI. 29.) ITM.

The User is responsible for fulfilling the invoice retention and archiving obligations prescribed by law, including the long-term retention of issued invoices.

4.4.5. The Service provides general invoicing functions only. The system does not include any special functions required by law (e.g., deposit fee management, differential taxation, data deletion code management), unless the Service Provider expressly indicates this in the description of the Service.

4.5. System usage restrictions

4.5.1. You may not use the Service in any manner that:

● unlawful data processing, sending spam, phishing, automated data collection,

● or leads to activity that overloads the system.

4.5.2. The Service Provider shall be entitled to immediately restrict or suspend access to the Service if the User's activities violate the above prohibitions or jeopardize the security of the system.

4.6. Availability and limitation of liability

4.6.1. The Service Provider undertakes to operate the Service with at least 98% availability on an annual basis, except during maintenance periods and force majeure events.

4.6.2. The Service Provider shall not be liable for:

● errors in the User's Internet connection,

● technical problems occurring on the User's devices,

● errors in services provided by third parties (e.g., banking, payment, NAV systems).

4.6.3. The Service Provider's liability shall be limited exclusively to direct damages proven to have occurred as a result of its own negligence.

The Service Provider shall not be liable for indirect damages (e.g. lost profits, loss of data, damages to third parties).

5. User rights and obligations

5.1. Obligation to pay fees

5.1.1.

The Kontozz Free package is free to use.

In order to use the paid packages ( Kontozz Basic, Kontozz Basic + Dr.CRM, Kontozz Pro), the User is obliged to pay the subscription fee specified by the Service Provider.

5.1.2. Subscription fees and payment methods are listed on the website www.kontozz.hu.

The Service Provider is entitled to modify prices, but the modifications will only affect active subscriptions from the next renewal period.

5.1.3. The User may pay the subscription fee using the online payment solutions provided by the Service Provider (e.g., credit card payment, bank transfer).

The subscription becomes valid upon receipt of payment.

5.1.4. In the event of late or unsuccessful payment, the Service Provider is entitled to suspend access to paid features or downgrade the User to the Kontozz Free package until the outstanding fees are settled.

5.1.5. The fees indicated by the Service Provider do not include value added tax (VAT), unless expressly stated in the fee description.

Invoicing is done electronically, and by registering, the User agrees that the Service Provider will only issue electronic invoices.

5.2. Accuracy and timeliness of data

5.2.1. The User is obliged to provide accurate and truthful information during registration and to ensure that this information is kept up to date.

The Service Provider shall not be liable for any damages resulting from incorrect or incomplete data.

5.2.2. If the Service Provider becomes aware that the User has provided false information, it shall be entitled to suspend or delete the Customer Account.

5.3. Account Use and Security

5.3.1. The User shall treat the login details associated with their Customer Account as confidential and shall ensure that no unauthorized persons have access to them.

5.3.2. The Service Provider shall not be liable for any damages resulting from the unauthorized use of login details, unless such damages can be attributed to the Service Provider's negligence.

5.3.3. The User shall immediately notify the Service Provider if they notice that their account has been used without authorization or that their data has been compromised.

In such cases, the Service Provider is entitled to temporarily block the account for security reasons.

5.4. Lawful and proper use

5.4.1. The User shall use the Service in accordance with the applicable laws and these GTC.

It is prohibited to use the Service for any purpose that violates any law, regulation, or the rights of third parties.

5.4.2. It is expressly prohibited to:

● issuing invoices with false or inaccurate content,

● unauthorized modification, decryption, or automated querying of the system,

● Overloading the Service or circumventing its security features.

● Commercial resale of the Service without the Service Provider's permission.

5.4.3. The Service Provider shall be entitled to suspend or terminate the use of the Service if the User's activity is unlawful, unethical, or jeopardizes the security of the system.

5.5. Obligation to cooperate

5.5.1. The User shall cooperate with the Service Provider in all cases where this is necessary for the provision of the service or for troubleshooting.

Error reports must be submitted to the email address or customer service channel provided by the Service Provider.

5.5.2. The User acknowledges that the Service Provider can only provide adequate support if the User provides accurate and truthful information about the problem.

5.6. Reputation protection and communication

5.6.1. The User shall refrain from any conduct that violates the Service Provider's reputation, business interests, or the rights of other Users.

5.6.2. The Service Provider reserves the right to immediately suspend or terminate the accounts of Users who engage in such behavior and to take legal action.

5.7. User's responsibility for data retention

5.7.1. The Service Provider performs regular backups, but the User is also obliged to ensure that their own data (especially billing information) is properly backed up.

5.7.2. The Service Provider shall not be liable for any loss of data resulting from the User's negligence, improper data management, or external technical errors (e.g., internet connection failure).

6. Intellectual Property and License Terms

6.1. Copyright protection

6.1.1. The kontozz.hu website, its entire software system, databases, source code, user interface, visual elements, layout, text and graphic content, and all related documentation are the exclusive property of Syneo International Kft. and are protected by law under the provisions of Act LXXVI of 1999 on copyright.

6.1.2. The User acknowledges that by using the Service, they do not acquire any ownership rights or copyrights over the intellectual property of the Service Provider.

6.2. License

6.2.1. The Service Provider grants the User a non-exclusive, non-transferable, and non-sublicensable right to access and use the Service for its intended purpose within the scope of its own business activities.

6.2.2. The license applies exclusively to use via the Service's web interface.

The Service, its parts or any of its components may not be copied, reproduced, modified, reverse-engineered, disassembled or further developed without the prior written consent of the Service Provider.

6.2.3. The User's expressly prohibited conduct includes, in particular:

● downloading, archiving, or redistributing any part of the software,

● attempts to obtain or decrypt the source code,

● Integrating or linking the Service with other software, unless expressly authorized by the Service Provider.

● as well as any conduct that infringes or threatens the intellectual property rights of the Service Provider.

6.3. API Access

6.3.1. The kontozz.hu service does not provide external API access, and the system's functions can only be used via the web interface.

The User is not entitled to access the Service or the database in an automated manner (e.g., using scripts, robots, external integration tools).

6.3.2. The Service Provider reserves the right to provide API access in the future, at its own discretion, but the terms and conditions thereof shall be specified in a separate agreement.

6.3.3. Certain features of the Service may be linked to external systems or services operated by third parties. The Service Provider is not responsible for the operation, availability, or data management of such external systems and does not guarantee their continued compatibility.

6.4. Use of trademarks and brand names

6.4.1. The name "kontozz.hu," logo, and visual elements are registered or protected trademarks of the Service Provider.

Their use is only possible with the prior written consent of the Service Provider.

6.4.2. The User is not entitled to use the Service Provider's name, logo, or image elements in their own advertisements, on their website, in their business communications, or in their marketing materials, unless they have received express written permission to do so.

6.5. Enforcement of rights and consequences of infringement

6.5.1. The Service Provider is entitled to use all legal means necessary to protect its intellectual property rights, including the cessation of infringement, the enforcement of claims for damages, and the initiation of criminal proceedings.

6.5.2. The Service Provider reserves the right to immediately suspend the Customer Account of any User who violates the law and to exclude the person concerned from using the Service.

7. Termination and cancellation of the contract

7.1. Term of the contract

7.1.1. The contract between the User and the Service Provider is concluded upon acceptance of the GTC during registration and is valid for an indefinite period.

7.1.2. The contract shall remain in force until the User's registration is deleted or terminated by the Service Provider.

7.2. Termination of the contract by the User

7.2.1. The User is entitled to terminate the contract at any time without giving any reason by deleting their Customer Account or sending an email notification to the Service Provider.

7.2.2. In the case of paid packages, the contract is valid until the end of the subscription period ordered, and termination initiated by the User does not entitle them to a refund of the fee already paid.

7.2.3. Before the termination of the contract, the User is obliged to settle all outstanding payment obligations and, if necessary, export their own data from the system.

7.3. Termination of the contract by the Service Provider

7.3.1. The Service Provider shall be entitled to terminate the contract with immediate effect if the User:

● seriously or repeatedly violates the GTC,

● uses the service for unlawful purposes,

● infringes intellectual property rights,

● or inactive for 12 months (does not log in or use the system).

7.3.2. The Service Provider reserves the right to terminate or modify the Service in whole or in part, but is obliged to notify Users of this at least 30 days in advance.

7.3.3. If the Service Provider permanently terminates the Service, it shall refund the pro rata portion of the active subscription fees to the Users concerned.

7.4. Consequences of termination of the contract

7.4.1. Upon termination of the contract, the Service Provider shall block access to the Customer Account, and use of the Service shall cease.

7.4.2. The Service Provider shall store the User's data in accordance with the relevant legislation and the Data Management Policy.

Data related to accounting and tax obligations must be retained for at least 8 years.

7.4.3. The User may request the deletion of their personal data, except for those that the Service Provider is required to retain due to legal obligations.

The Service Provider may retain deleted data for up to 90 days after the deletion of the User Account for technical and security reasons (e.g., for the purpose of restoring backups). After this period, the data will be permanently and irretrievably deleted.

7.4.4. Termination of the contract shall not affect the parties' existing rights and obligations, in particular those relating to payment of fees, confidentiality, and intellectual property.

7.4.5. The Service Provider makes regular backups of the data stored in the system, but it is in the User's own interest to periodically back up or export data that is important to them. The Service Provider shall not be liable for any loss of data resulting from the User's negligence, failure to back up data in a timely manner, or external technical errors.

7.5. Reconnecting and restoring your account

7.5.1. If the User has voluntarily deleted their account and later wishes to use the Service again, they must re-register.

7.5.2. The Service Provider does not guarantee that previous data can be restored if the account has already been deleted or the contract has already been terminated.

7.6. Force majeure

7.6.1. The parties shall be exempt from their obligation to perform the contract if the performance of the obligation is prevented by unforeseeable and unavoidable external circumstances (e.g., natural disaster, war, fire, data center failure, cyberattack).

Force majeure includes, but is not limited to: errors on the part of Internet or data center providers, network failures, cloud provider outages, fire, power outages, cyber attacks, or other events beyond the reasonable control of the Service Provider.

7.6.2. During the period of force majeure, the Service Provider shall be entitled to restrict or suspend the operation of the Service.

Once the force majeure has ceased, it shall endeavor to restore the service as soon as possible.

8. Data protection and confidentiality

8.1. Legal basis and rules for data processing

8.1.1. The Service Provider shall process Users' personal data in accordance with the provisions of applicable laws, in particular the General Data Protection Regulation (GDPR) (EU) 2016/679 and the Info tv. (Act CXII of 2011).

8.1.2. The detailed rules of data processing are contained in the Service Provider's Data Processing Notice, which is available at any time on the website www.kontozz.hu.

By registering, the User declares that they have read and accepted the data processing information.

8.1.3. The Service Provider shall process the data solely for the purpose of providing the Service, complying with legal regulations, and maintaining the operation of the system.

Data shall only be transferred to third parties in cases specified by law or with the consent of the data subject.

8.2. Data security

8.2.1. The Service Provider considers the protection of personal and business data to be of paramount importance and shall take all reasonable technical, organizational, and administrative measures to ensure the confidentiality, integrity, and availability of the data.

8.2.2. The Service Provider shall apply the following security measures in particular:

● encrypted (HTTPS, TLS) data transfer,

● 2FA login,

● Secure, encrypted storage of passwords

● regular data backup and version management,

● Restriction and logging of access rights,

● Confidentiality obligations of employees and contracted partners.

8.2.3. The User is obliged to ensure the security of data and login details on their own devices, in particular by keeping their passwords secret and preventing unauthorized access.

The Service Provider shall not be liable for any security incidents occurring on the User's devices or network.

8.2.4. The Service Provider is entitled to produce anonymized, statistical, or aggregated information from the data generated during the use of the Service and to use it for business, development, or service improvement purposes. Such data does not contain any personal or identifiable information and is not suitable for identifying Users. The use of anonymized data does not constitute the processing of personal data within the meaning of Recital 26 of the GDPR.

8.3. Data processors

8.3.1. The Service Provider may use data processors in the course of operating the Service (e.g., hosting provider, email delivery system, payment service provider).

Data processors shall act exclusively on the instructions of the Service Provider, in accordance with the law and in compliance with the data protection obligations set out in the contract.

8.3.2. The Service Provider carefully selects its partners and enters into contracts with them that ensure that data processing complies with the requirements of the GDPR in all respects.

The Service Provider publishes the current list of data processors on its website.

8.4. Confidentiality

8.4.1. The Service Provider and the User shall treat all information relating to the other party's activities, business data, customers, technological solutions, or business strategy as confidential.

8.4.2. The confidentiality obligation shall remain in force for an indefinite period even after the termination of the contract.

The parties may only disclose the other party's confidential information to third parties in the event of a legal obligation or official request.

8.4.3. The User shall refrain from copying, disclosing or making available to third parties the Service Provider's technical solutions, systems or documentation in any form.

8.5. Handling of data protection incidents

8.5.1. Any event that may result in unauthorized access to, loss, destruction, or disclosure of personal data shall be considered a data protection incident.

8.5.2. Upon detecting a data protection incident, the Service Provider shall immediately investigate the case, take measures to reduce the risks, and, if necessary, notify the affected Users and the National Authority for Data Protection and Freedom of Information (NAIH).

8.5.3. The User shall notify the Service Provider if they detect a security incident on their own devices or in their account that may also affect the data managed in the kontozz.hu system.

9. Complaint handling, legal disputes, and applicable law

9.1. Complaint handling and customer service

9.1.1. The Service Provider shall endeavor to ensure that the service provided to Users is of an appropriate standard at all times.

If the User has any questions, comments, or complaints, they can contact us using one of the following methods:

● E-mail: ugyfelszolgalat@syneo.hu, support@syneo.hu

● Postal address: Syneo International Kft., 9700 Szombathely, Kürtös utca 5.

9.1.2. The Service Provider shall investigate and respond to complaints within 30 days at the latest.

If the complaint is rejected, the Service Provider shall send a written response to the User, stating the reasons for the rejection.

9.1.3. During the complaint handling process, the Service Provider shall process the data provided by the User solely for the purpose of investigating the complaint and responding to it. Details of data processing are included in the Data Processing Notice.

9.2. Conciliation board procedure

9.2.1. If the User qualifies as a consumer (i.e., does not use the Service as a business) and has been unable to resolve their complaint with the Service Provider, they are entitled to refer the matter to the conciliation body competent for their place of residence or location.

9.2.2. The conciliation body competent for the Service Provider's registered office:

Conciliation Board operating alongside the Vas County Chamber of Commerce and Industry (registered office: 9700 Szombathely, Rákóczi F. u. 23., e-mail: bekelteto@vmkik.hu)

9.2.3. The Service Provider shall cooperate in the conciliation board proceedings, but shall not be obliged to accept its decision.

Before initiating the procedure, the User shall https://bekeltetes.hu .

9.3. Online dispute resolution platform

9.3.1. If the User qualifies as a consumer, they may also use the online dispute resolution platform (ODR) operated by the European Commission, which is available at https://ec.europa.eu/consumers/odr.

9.3.2.

The purpose of the ODR platform is to enable consumer disputes relating to online services to be settled amicably, without court proceedings.

9.4. Enforcement by the courts

9.4.1. In the event of legal disputes between the User and the Service Provider, if these cannot be settled amicably, the parties agree to apply Hungarian law.

9.4.2. The parties submit to the exclusive jurisdiction of the Szombathely District Court competent for the seat of the Service Provider or, in the case of a value limit, the Szombathely Regional Court.

9.4.3. The Service Provider and the User shall make every effort to settle any disputes arising between them through negotiation and amicable agreement before taking legal action.

9.5. Governing law and language

9.5.1. Issues not regulated in these GTC shall be governed by Hungarian law, in particular Act V of 2013 on the Civil Code, Act CVIII of 2001 on Electronic Commerce Services, and the provisions of the relevant tax and consumer protection laws.

9.5.2. The language of the contract is Hungarian, and the Service Provider does not guarantee the authenticity of any foreign language versions of the contract.

9.6. Relevant legislation

The operation of the Service and these GTC are governed in particular by the following laws:

● Act V of 2013 on the Civil Code (Ptk.),

● Act CVIII of 2001 on Electronic Commerce Services (Eker. tv.),

● Act CXXVII of 2007 on Value Added Tax (VAT Act),

● Act C of 2000 on Accounting (Accounting Act),

● Act CXII of 2011 on the Right to Informational Self-Determination and Freedom of Information (Info Act)

● Regulation (EU) 2016/679 (GDPR),

● as well as the current NAV and ITM regulations on electronic invoicing and data reporting.

10. Final provisions

10.1. Scope of the GTC

10.1.1. These General Terms and Conditions (GTC) apply to the kontozz.hu online invoicing service operated by Syneo International Kft. and are binding on all Users who use the Service.

10.1.2. Date of entry into force of the GTC: November 7, 2025.

The document shall take effect on the date of its publication and shall remain in force until revoked.

10.2. Amendments to the GTC

10.2.1. The Service Provider shall be entitled to unilaterally amend these GTC if such amendment is justified by the development of the Service, changes in legislation, technological modifications or business reasons.

10.2.2. The Service Provider shall notify Users of the amendment at least 15 days prior to its entry into force by email or by posting a notice on the kontozz.hu website.

10.2.3. The amended GTC shall be binding on all new and existing Users after its entry into force. If the User does not agree with the amendment, they shall be entitled to terminate the contract by deleting their Customer Account.

10.3. Availability of the document

10.3.1. The currently valid GTC are available and can be downloaded in PDF format from the website www.kontozz.hu.

The Service Provider shall retain previous versions of the GTC and make them available to Users upon request.

10.4. Interpretative provisions

10.4.1. If any provision of these GTC is invalid, void, or unenforceable, it shall not affect the validity of the remaining provisions.

The invalid provision shall be replaced by a rule that most closely corresponds to the original intention of the parties and the legal requirements.

10.4.2. Communication between the Service Provider and the User shall primarily take place electronically. The Service Provider shall consider the email address provided by the User to be the official channel of communication.

10.4.3. The Service Provider may send official notifications to the User by email, within the kontozz.hu account, or by means of an announcement published on the website.

Messages delivered to the email address provided by the User shall be deemed to have been delivered, regardless of whether the User has actually opened them.

10.5. Contact and availability

Service provider: Syneo International Ltd.

Headquarters: 9700 Szombathely, Kürtös utca 5.

Company registration number: 18 09 115488

Email: ugyfelszolgalat@syneo.hu, support@syneo.hu Website: www.kontozz.hu

10.6. Closing statement

During registration, the User declares that they have read and understood these General Terms and Conditions and accept them as binding.

Use of the Service constitutes acceptance of the Terms and Conditions.

Prepared in Szombathely , November 6, 2025.