Data Protection Complaint Request for Further Information 
This Data Protection Complaint Request for Further Information Letter is designed for use where an organisation has received a complaint about the handling of personal data but needs more information before it can investigate or respond properly.
The letter helps you explain what information is required, why it is needed, and how the complainant should provide it.
Note: While structured as a letter, this template can be easily adapted for use as an email or direct message response.
When Should This Letter Be Used?
This letter should be used where a data protection complaint is unclear, incomplete, too broad, or missing information that you need in order to investigate the complaint properly.
What Does This Letter Cover?
This Data Protection Complaint Request for Further Information Letter helps you ask for the information needed to understand and investigate a personal data complaint, including:
- confirmation that the complaint has been received
- a complaint reference for future correspondence
- details of the further information needed
- an explanation of why the information is required
- instructions for providing the requested information
- an optional response deadline
- optional wording explaining that you may be unable to investigate the complaint fully or respond to all issues raised if the requested information is not provided
Legal and Compliant
This Data Protection Complaint Request for Further Information Letter is designed to support compliance with UK data protection law, including the UK GDPR, the Data Protection Act 2018, and the Data (Use and Access) Act 2025.
It helps you handle complaints fairly and effectively by requesting only the information needed to understand the complaint and continue with the investigation.
How Should This Template Be Used?
This letter should be adapted to include your organisation’s name, contact details, complaint reference, the information required, the reason for the request, and any deadline for responding.
You should ensure that any request for further information is necessary and proportionate in the circumstances. You should not use requests for further information to delay or discourage complaints.
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