It's always weird when I get a credit from some Adult Responsibility Place. I used some of the money to get something called a Kofta Kebab. It was amazing.
This happened to me like 2 weeks ago, except it was a check from Dell for an account I paid off in 2009. It was for $118. I was so suspicious when I opened the envelope. Funny enough, it came with a letter basically saying "Don't be suspicious, we fucked up. Cashing this check will not obligate you to anything."