[mehrdadn]

How did you find out?

[xtony]

The other person was able to use his/my SSN to "mistakenly" withdraw a large amount of money from my bank account. That was what first tipped me off.

[Nzen]

Presumably, sho'he requested a credit report to verify success and saw a lifetime of someone else's credit interactions (different car, mortgage, credit cards). <edit for irreverent trailer : https://www.youtube.com/watch?v=OnouJoQs52c />