Can I use someone else's Social Security number?

It is illegal to use someone else's Social Security number in all circumstances. Fines and imprisonment can be imposed if an individual uses another person's Social Security number.

It is also illegal to buy or alter Social Security cards.

The Social Security number is used as a unique identifying number for each U.S. citizen. Most citizens receive a Social Security number when they are born. Social Security numbers are required to work in the United States. People who are not citizens may obtain a Social Security number and card for identification purposes, but they cannot use it for work purposes.