Subject: Follow-up on personal-data restriction request [reference, if non-secret]
Hello,
I am following up on the [deletion, suppression, exact opt-out, block, or freeze choice] request I submitted on [date] through [channel]. Your reference, if any, is [non-secret reference].
Please tell me the current status, whether you need any action from me, and the official channel for that action. I am not including additional personal information unless it is necessary for a reviewed verification step.
Thank you,
[name, only if required]