Thanks guys. Your posts helped me feel a lot better about the situation. I'll admit, I was a little worried. I'm hoping I didn't give them too much information about the debt. I made it clear that I don't believe it's my debt, but I did say that I would try to figure it out then call him back...
Approximately nine years ago, when I was a minor (~15 yrs old), my bank debit card was stolen from me. There were transactions done which caused the account to overdraft. I went through the whole procedure of getting a police report etc, and never used the account again. I had completely forgot...