It's supposed to be unique and might actually be now, but there are def duplicate ssns out there. Craziest identity situation I was told by a project manager of government system that is all about identities. Same First, Same last,same Date of Birth, same SSN; different people.

[–] [email protected] 6 points 1 day ago

Weird story, and I have to assume this is data entry error, identity theft, or something else: I couldn't sign up for a hospital billing platform because my name and full birthdate (including year) conflicted with someone else in the system. I called the hospital billing department and they were very confused about the whole situation. It didn't really get resolved, and I basically had to let it go to collections so that I could pay because of the shitty system. I don't have a very common name, and never have had this problem before.