The signed cover-letter structure that worked for us
For our successful USCIS request, we submitted an online FOIA request and attached a signed cover letter. The subject was deceased, so we also attached proof of death. Our letter identified the subject with full name, maiden name, date/place of birth, the known A-number and a related cross-referenced A-number.
A practical issue we hit: the deceased person's address
An earlier submission in our case received a non-compliance response connected to the missing subject address. On the successful resubmission, we put the deceased person's last known U.S. address directly into the signed cover letter. That is our experience—not a claim that every FOIA request fails without the same wording.
Proof of death matters
USCIS's current FOIA instructions provide for proof of death when requesting records concerning a deceased person, with an exception generally available where the subject was born more than 100 years before the request. Follow the current USCIS instructions for acceptable proof.
How the records arrived for us
USCIS ultimately made the released records available electronically through its system, together with a response letter. We downloaded the release and used it in our citizenship-document package. The German mission accepted the downloaded records in our particular case; another case or mission can have different evidentiary needs.
Why request the complete file?
We were not looking for one isolated form. We wanted the immigration, visa and naturalization trail, related correspondence and cross-references that could establish what happened and when. In citizenship-by-descent research, timing can be as important as the existence of a later naturalization record.
Official sources
Use current agency instructions at the time you file. This article describes our workflow and is not a substitute for USCIS or NARA requirements.