We all seems to have too much time and nit pic..Need to go out and do some shed hunting.
Anyways ..from the main site..https://www.atf.gov/firearms/docs/4473-part-1-firearms-transaction-record-over-counter-atf-form-53009/download
:9. Transferee’s/Buyer’s Full Name (If legal name contains an initial only, record the initial followed by “IO” in quotes. If no middle initial or name, record “NMN”.)