Sunday Data Processing Addendum (the “DPA”)
Last updated: 30 March 2026
The DPA forms part of the General Terms of Service between Sunday and the Merchant (the “Agreement”) under which Sunday provides technology services to the Merchant. Terms not defined in this DPA shall have the meaning given to them in the Agreement. If any term in this DPA conflicts with any term in the Agreement then this DPA shall prevail. The duration of the processing shall be for the term of the Agreement.
Certain words and phrases in this DPA have specific definitions when they start with capital letters. Where a defined term is used, it either has the meaning set out in annex 1 below (Definitions) or the meaning given to it in the relevant clause of this DPA. ”Data controller”, “data subject”, “personal data”, “process”, “processing”, “data processor” “data subject request”, “personal data breach”, “subprocessors” and “supervisory authority” shall have the meaning given to it in the Data Protection Legislation.
2. PROCESSING PERSONAL DATA AS A DATA CONTROLLER
2.1 This clause 2 applies to the processing of personal data by Sunday where:
(i) User personal data is received as a result of the User’s direct relationship or intentional interaction with Sunday, such as through the User Services as defined in the User Terms of Services available at https://sundayapp.com/gb-en/user-terms-of-service/;
and; (ii) personal data is related to the Merchant’s personnel, including servers, and transferred to or made available to Sunday by the Merchant in connection with the provision of the Sunday Services.
and; (ii) personal data is related to the Merchant’s personnel, including servers, and transferred to or made available to Sunday by the Merchant in connection with the provision of the Sunday Services.
2.2 The Merchant acknowledges that Sunday acts as an independent data controller with regards to the ways described in clause 2.1.
2.3 The Merchant understands and acknowledges that personal data in the scope of this clause 2 shall be processed by Sunday in accordance with:
(i) our User Privacy Policy accessible at https://sundayapp.com/gb-en/privacy-policy/;
and (ii) our Privacy Policy for Merchants accessible at https://sundayapp.com/en-gb/privacy-policy-waiters-personnel/.
and (ii) our Privacy Policy for Merchants accessible at https://sundayapp.com/en-gb/privacy-policy-waiters-personnel/.
2.4 The Merchant shall ensure that it has all necessary appropriate consents and notices in place to enable lawful transfer of the personal data related to its personnel to Sunday for the duration and purposes of this DPA.
2.5 Anonymisation and Derived Data. Pursuant to the licence granted by the Merchant under Section 12.3(a) of the Agreement, Sunday shall anonymise and aggregate personal data contained in Merchant Data (including, where applicable, data relating to the Merchant's personnel) for the purpose of creating Derived Data. For the purposes of clause 3.2 of this DPA, this constitutes a documented instruction from the Merchant, the execution of which results in the creation of data that no longer constitutes personal data within the meaning of the Data Protection Legislation.
Once Derived Data has been created, it is no longer subject to the obligations of this DPA relating to the processing of personal data. The conditions of use and exploitation of Derived Data are governed exclusively by Section 12.3 of the Agreement.
2.6 Anonymisation of Merchant Data for Derived Data. Pursuant to the licence granted by the Merchant under Section 12.3(a) of the Agreement, Sunday shall anonymise and aggregate personal data contained in Merchant Data (including, where applicable, data relating to the Merchant's personnel) for the purpose of creating Derived Data. For the purposes of clause 3.2 of this DPA, this constitutes a documented instruction from the Merchant, the execution of which results in the creation of data that no longer constitutes personal data within the meaning of the Data Protection Legislation.
Once Derived Data has been created, it is no longer subject to the obligations of this DPA relating to the processing of personal data. The conditions of use and exploitation of Derived Data are governed exclusively by Section 12.3 of the Agreement.
3. PROCESSING PERSONAL DATA ON BEHALF OF THE MERCHANT
3.1 When Sunday processes personal data in the course of providing the Sunday Services to the Merchant under the Agreement, Sunday will process personal data as a data processor and/or service provider, only for the purpose of providing the Services. In its capacity as data processor, Sunday may aggregate or pseudonymise personal data processed on behalf of the Merchant, solely for the purposes described in Annex 2 and in accordance with the Merchant's documented instructions. It is specified that:
(i) the anonymisation of User Data for the purpose of creating Derived Data within the meaning of Section 12.3 of the Agreement falls exclusively within clause 2.5 of this DPA and Sunday's status as an independent data controller;
(ii) the anonymisation of personal data contained in Merchant Data for the purpose of creating Derived Data is carried out in accordance with the Merchant's documented instruction set out in clause 2.6 of this DPA.
3.2 Sunday shall process personal data in accordance with the Merchant's documented instructions (provided that such instructions are commensurate with the functionalities of the Sunday Services), unless Sunday is required by law to process personal data for any other purpose. If Sunday is of the opinion that an instruction from the Merchant infringes the Data Protection Laws, Sunday shall inform the latter thereof.
3.3 Sunday shall comply with all Data Protection Laws applicable to Sunday in its role as a data processor. The Merchant shall comply with all Data Protection Laws applicable to them as a data controller.
3.4 In the course of providing the Sunday Services, the Merchant acknowledges and hereby grants Sunday general written authorisation to use Subprocessors, listed online at: https://sundayapp.com/sunday-subprocessors/;
(“Subprocessor List”), to process the personal data. Sunday’s use of any specific subprocessor to process the personal data must be in compliance with Data Protection Laws and must be governed by a contract between Sunday and the subprocessor that requires comparable protections to this DPA. If Sunday appoints a new subprocessor or intends to make changes concerning the addition or replacement of subprocessors, such changes will be made to our Subprocessor List. The Merchant will have seven (7) days from the date of the update of our Subprocessor List to object to the change. If the Merchant objects to the appointment of a Subprocessor, the Merchant may terminate the Agreement.
(“Subprocessor List”), to process the personal data. Sunday’s use of any specific subprocessor to process the personal data must be in compliance with Data Protection Laws and must be governed by a contract between Sunday and the subprocessor that requires comparable protections to this DPA. If Sunday appoints a new subprocessor or intends to make changes concerning the addition or replacement of subprocessors, such changes will be made to our Subprocessor List. The Merchant will have seven (7) days from the date of the update of our Subprocessor List to object to the change. If the Merchant objects to the appointment of a Subprocessor, the Merchant may terminate the Agreement.
3.5 Sunday shall assist the Merchant in responding to any request from a data subject and in ensuring compliance with its obligations under the Data Protection Laws with respect to security, breach notifications, impact assessments and consultations with supervisory authorities or regulators.
3.6 Sunday shall notify the Merchant without undue delay upon becoming aware of and confirming any accidental, unauthorized, or unlawful processing of, disclosure of, or access to the personal data.
3.7 In order to provide the Sunday Services to the Merchant, Sunday will only access and process personal data from (i) countries in the EEA, (ii) countries or territories formally recognised by the European Commission as providing an adequate level of data protection (“Adequate Countries”) and (iii) third countries or territories provided Sunday and the relevant subprocessor have put a Valid Transfer Mechanism in place.
3.8 Sunday shall at the written direction of the Merchant, delete or return personal data and copies thereof to the Merchant on termination of this DPA unless required by Data Protection Laws or other applicable laws to store personal data.
3.9 Sunday shall implement, and at all times during this DPA maintain technical and organizational safeguards to protect personal data from unauthorized or unlawful processing or accidental loss or damage: (i) ensuring in each case a level of security appropriate to the risk; and (ii) maintaining PCI DSS level 1 service provider certification; and (iii) in addition maintaining controls in line with accepted industry practices including the International Organization for Standardization's standards: Requirements of the National Institute of Standards and Technology (NIST) Cybersecurity Framework.
3.10 At a minimum, Sunday’s safeguards for the protection of personal data shall include: (i) securing, cloud systems, backup systems, and computing equipment, including, but not limited to, all endpoint devices and other equipment with information storage capability; (ii) implementing network, application, database, and platform security; (iii) securing information transmission, storage, and disposal; (iv) implementing authentication and access controls within media, applications, operating systems, and equipment; (v) encrypting personal data at rest where possible; (vi) encrypting personal data transmitted over transit in network; (vii) strictly segregating Merchant data from information of Sunday or its other customers so that Merchant Data is not commingled with any other types of information; (viii) conducting risk assessments, and vulnerability scans and promptly implementing, at Sunday’s sole cost and expense, a corrective action plan to correct any issues that are reported as a result of the testing; (ix) implementing appropriate personnel security and integrity procedures and practices; and (x) providing appropriate information security awareness training to Sunday employees.
3.11 Where Sunday collects end-customer personal data and marketing consent on behalf of the Merchant pursuant to the Guest Marketing Feature:
(a) The Merchant is solely responsible for all marketing communications sent to end-customers using data collected via the Sunday Services, and shall ensure full compliance with all applicable data protection and electronic marketing laws, including without limitation UK GDPR and the Privacy and Electronic Communications Regulations 2003 (PECR);
(b) The Merchant shall include a clear, functional, and easily accessible unsubscribe mechanism in every marketing communication sent to end-customers whose data was collected via the Sunday Services;
(c) The Merchant shall only use end-customer data for the purposes for which consent was collected at the point of payment, and shall not share, sell, or transfer such data to any third party without obtaining additional appropriate consent;
(d) Sunday shall bear no liability whatsoever for the content, frequency, or lawfulness of marketing communications sent by the Merchant to end-customers, provided Sunday has collected and transferred the data in accordance with this DPA;
(e) The Merchant shall indemnify Sunday against any claims, penalties, or regulatory actions arising from the Merchant's non-compliance with its obligations under this clause 3.11.
3.12 Where Sunday displays a marketing consent checkbox to end-customers at the point of payment on behalf of the Merchant:
(a) The consent checkbox shall clearly identify the Merchant by name as the entity that will send marketing communications, so that end-customers are fully informed of who will contact them;
(b) The Merchant acknowledges that Sunday's use of a pre-checked opt-out mechanism in this context relies on the Soft Opt-in exception under PECR Regulation 22(3), and that this mechanism is only lawful where: (i) the end-customer's contact details are collected in the course of a sale; (ii) the marketing relates to the Merchant's own similar products or services; and (iii) the end-customer is given a simple and visible opportunity to refuse at the point of collection;
(c) The Merchant shall not instruct Sunday to use a consent mechanism that does not meet the requirements of applicable law, and Sunday reserves the right to modify or disable the consent collection mechanism if required to comply with applicable Data Protection Laws or regulatory guidance.
Annex 1. Definitions
Data Protection Legislation
all applicable data protection and privacy legislation in force from time to time including the General Data Protection Regulation ((EU) 2016/679) (‘GDPR’); the Data Protection Act 2018; the Privacy and Electronic Communications Directive 2002/58/EC (as updated by Directive 2009/136/EC) and the Privacy and Electronic Communications Regulations 2003 (SI 2003 No. 2426) as amended; any other European Union legislation relating to the use of personal data and all other legislation and regulatory requirements in force from time to time which apply to a Party relating to the use of personal data.
Derived Data
anonymised and aggregated data sets created by Sunday from Merchant Data and/or User Data, which do not permit, directly or indirectly, the identification of any User, the Merchant, or any other natural person, and which do not constitute personal data within the meaning of the Data Protection Legislation. The conditions for the creation and exploitation of Derived Data are set out in clause 2.5 and clause 2.6 of this DPA and in Section 12.3 of the Agreement.
Guest Marketing Feature
the optional functionality within the Sunday Services that enables the Merchant to collect end-customer email addresses and associated marketing consent preferences at the point of payment, for the purpose of the Merchant sending marketing communications directly to its end-customers.
Valid Transfer Mechanism
a data transfer mechanism permitted by the Data Protection Laws as a lawful basis for transferring personal data to a recipient located in a third country in the meaning of GDPR and the Data Protection Act 2018.
Annex 2. Description of the processing (clause 3 - data processor)
Nature and Purpose of the processing
Provision of the Sunday Services to the Merchant; processing of payment transactions; real-time transaction monitoring; reporting and analytics; technical support; integration with the Merchant's point-of-sale (POS) systems; any related support to Merchant as otherwise permitted under the Data Protection Legislation; anonymisation and aggregation of personal data contained in Merchant Data for the purpose of creating Derived Data, in accordance with the Merchant's documented instruction set out in clause 2.6 of this DPA and Section 12.3 of the Agreement ; where the Merchant activates the Guest Marketing Feature, collection on behalf of the Merchant of end-customer email addresses and associated marketing consent preferences (including opt-in or opt-out status) at the point of payment, for which Sunday acts solely as a data processor and the Merchant remains the sole data controller for any subsequent marketing communications.
Types of personal data
Merchant Data which may include personal data (in particular data relating to the Merchant's personnel such as first name, surname, contact details, role); transactional data relating to the Merchant's Establishment(s); User personal data to the extent processed on the Merchant's documented instructions.
Categories of Data Subjects
Merchant's personnel (including servers); Users (to the extent their data is processed on behalf of the Merchant in accordance with its documented instructions).
Duration of processing
The term of the Agreement, plus the period necessary for the deletion or return of all personal data by Sunday in accordance with clause 3.8 of this DPA.