Final answer:
You should sign your full legal name on your Social Security card to match the name printed on the card, which is crucial for identification and preventing identity theft.
Step-by-step explanation:
When you receive your Social Security card, it is recommended that you sign your full legal name as it appears on the card. This signature identifies you as the person to whom the Social Security Number (SSN) has been issued. It is essential to sign your full name for official documents to reduce the risk of identity theft and ensure that the card can serve its purpose as a vital piece of identification.