by St. Funogas, Survival Blog:

(Continued from Part 2.)

SOCIAL SECURITY NUMBER

It goes without saying that our social security number shouldn’t be given to anyone unless we’re legally required to provide it, and that’s not very often. On the other hand, if it’s a private business they can also deny us service. But there’s a caveat.

After selling an item to a business for a large sum of money I went straight to their bank to cash the check. The amount of cash was small enough to avoid government paperwork but the bank demanded I write my social security number below my signature on the check.