called my mom wanting my ssn, said he had paperwork come across his desk and needed to confirm my number. She said he only gave some initials for his name and didn't say who he worked for.

Phone calls mean nothing.  IF there is a problem, you want a WRITTEN statement from that company that is MAILED to you.  It must contain information such as  - their company name  & address, original debt to  company, amount, dates, etc.