A Lieberman wrote in
:

I don't know the time frame, but I believe the certificate numbers were
SSN's before identity thief became a problem.

I'm not sure when the FAA started using SSNs for pilot's certificate
numbers, but it was after I got mine. My certificate has never used my
SSN.

--
Regards,

Stan

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." B. Franklin