| Happened on my credit card a year or so ago. Someone must have put the wrong number on a payment, and all of a sudden I was a few $100 up. I just ignored it, and a couple of months later they took the cash back. Most annoying thing was they then said I'd missed a payment, even though my account was in credit (according to them) at the time because they took out the cash after sending me a statement. They then appologised, and then charged me fee's for the next three months for that missed payment (each time I phoned up, and they fixed it, but it was still annoying). I still came out ahead...
Just enjoy having it there, don't spend it, and expect them to take it back in a month or so when some one gets their next statement and notices that their cheque didn't go in.
Ian |