How do I verify the identity of the person making the request?

Identity verification for data subject requests must balance thoroughness against accessibility. You need reasonable confidence that the requester is actually the data subject (or their authorized representative), not someone impersonating them to access private information. However, verification processes shouldn't be so burdensome that they discourage legitimate requests. That uitself would be a compliance problem. The appropriate level of verification depends on the sensitivity of the data and the risk of unauthorized disclosure.

For email-related requests, common verification approaches include: email confirmation (sending a verification link to the email address on file), knowledge-based verification (asking questions about their account that only they should know), account-based verification (requiring them to make the request through an authenticated account portal), or documentation review (accepting government ID if other methods aren't feasible). The method should match the request channel-a request from the same email address as the subscriber record may need less additional verification than an anonymous web form submission.

Document your verification policy and apply it consistently. Don't demand extensive documentation from some requesters while accepting claims at face value from others. If you reject a request due to failed verification, explain what verification you require and give the person opportunity to complete it. Remember that overly stringent verification can be seen as obstruction. You ucan't demand in-person appearance or notarized documents for routine requests. The GDPR specifies that verification measures should be proportionate and not be used to delay or obstruct legitimate requests. Verification protects both you and the data subject-confirm you're speaking to the right person, but don't build barriers that prevent legitimate requests from being fulfilled.