This article is part of The Duty.
Who does the 30-day duty apply to?
Section 164A applies to every UK data controller. There are no exemptions for size, revenue, or sector.
If your organisation handles personal data of UK residents — customers, employees, suppliers, or members — you are a data controller subject to this duty.
The four obligations
- 1. Facilitate complaints: You must provide a way for individuals to complain about how their personal data is handled.
- 2. Acknowledge: You must acknowledge every complaint within 30 days of receipt.
- 3. Respond: You must respond to the complaint without undue delay.
- 4. Evidence: You must keep evidence of the complaint, the acknowledgement, and the response for regulatory review.
Read next
- The practical 30-day clock — what counts as day one, and what an acknowledgement requires.
- What an ICO evidence pack looks like — the audit trail the regulator expects to see.