Cover of Working with Processors and Suppliers by Data Menu

Security

Working with Processors and Suppliers

Due diligence, data processing agreements and international transfers, with checklists and templates.

Format
PDF
Length
18 pages
Edition
1st edition, November 2026
Published
2 November 2026
Publisher
Data Menu
£24PDF, single instant download

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About

About this guide

A practical UK guide to the suppliers that handle personal data for you. It explains controllers, processors and joint controllers, how to work out the role of each supplier, and how to carry out proportionate due diligence before you sign.

It walks through the Article 28 contract terms, red flags to look for in a data processing agreement, how sub-processors work, how to handle transfers outside the UK including the IDTA, the UK Addendum and the data protection test, and how to manage suppliers over time and end the relationship properly. A short chapter covers your own duties when you are the supplier. Includes a supplier register, due diligence questionnaire, contract clause checklist, instruction record and exit checklist.

General educational guidance written by Data Menu. It is not legal advice.

Contents

What is inside

  1. Controllers, processors and why roles matterControllers, processors and joint controllers, with typical supplier rolesp. 4
  2. Choosing a supplier: due diligenceArticle 28 sufficient guarantees and proportionate due diligencep. 6
  3. What the contract must containThe details and terms an Article 28 contract must containp. 7
  4. Reading a data processing agreementRed flags in a data processing agreement and what to negotiatep. 9
  5. Sub-processorsAuthorisation, notification and flow-down for sub-processorsp. 10
  6. Transfers outside the UKRestricted transfers, the main routes and the data protection testp. 11
  7. Managing suppliers over timeA supplier register, review rhythm and ongoing managementp. 12
  8. Ending the relationshipDeletion or return, confirmation and revoking access at exitp. 14
  9. When you are the supplierDirect duties and common pitfalls when you are the supplierp. 15
  10. Templates and checklistsRegister, questionnaire, clause checklist, instruction record, exit checklistp. 16

Audience

Who it is for

  • Owners and managers
  • Operations and procurement leads
  • IT and security managers
  • Anyone signing up to a service that holds personal data

Delivery. After payment you can download the PDF straight away, and we email you a personal link to the same page. Each purchase is a single download, so please save the file somewhere safe when it arrives. If a download is interrupted, you can retry from that page for a few minutes. Our guides are practical, educational material. They are not legal advice. If you need advice on your own situation, speak to a qualified adviser.