Go to the store and speak with the manager, and bring the game back. I had the same problem with Blockbuster – except I had returned the game inadvertently to the wrong store in town. They are marked accordingly, so all the store that I dropped it off had to do was send it to the right one, or call me and ask ME to bring it to the right one. Instead, I got thet letter you mention. I immediately called the store where I returned it and they said they didn’t have the game. I called the store where I SHOULD have returned it to see if they got it. Nope. In the end, and I wouldn’t give up as I had NEVER gotten a collections letter (and this was going to be a $50 total problem here – peanuts!). I called the store every day to see if they found the game. Lo and behold, an employee who knew the game didn’t belong there had taken it home! When he heard they were on the lookout for it – he brought it back. They called me and I returned it to the correct store. And I never, ever rented from Blockbuster again. And, both of the stores are now out of business. Good enough for them. So, yes, go to the store and return the game and that should clear up your debt. Good luck.