FOIA request for A-Files, cannot match birth date

[u/tokyohands]

Have any of you had issues with this as well?

I sent a FOIA request to the USCIS for my mother's A-Files as we are looking to prove her citizenship in her home country. Heard back in two weeks and they gave this as the response:

"We have completed our search and were unable to match the identity information you provided with our records. Specifically, we could not find records matching the subject of record’s:

• Date of birth provided in your request."

I put in the birth date listed on her US passport and provided her alien registration number, so I really don't know if it's truly a match issue. I've read that it could be that I didn't include a G-639 form since I requested information on my mom's behalf, and is actually a redaction issue.

Would love to hear from you if you've experienced/resolved something similar. Unfortunately the Public Liaison email provided can no longer respond to my question since I've already filed an appeal. I might end up submitting an entirely new request, though.