Sign Your Card. The whole point of a signature is not that it is a secret symbol known only to you, but that only you can accurately duplicate it on command. It is not that hard for anyone can see a copy of your signature from public records, from a canceled check, and of course, from the credit card receipts you must sign.
A National Stock Number (NSN), as it is known in the US, or a NATO Stock Number, is a 13-digit numeric code identifying all the standardized material items of supply as they have been recognized by all NATO countries including the US Department of Defense.
What the NSN is used for. You can use NSNs for: enrolment - schools include NSNs in ENROL, the school student enrolment register, and in their student management system. The NSN has become a data element within the student management system record for each student. The NSN is mandatory in the .moe file for each roll return.