<prompt> Human: Its been like 2 weeks and the dealer has not cashed my check. A big dealership for Toyota, not a mom and pop shop. What do I do here? Do I call the dealer and write them a new check, put a stop processing on the old check? Do I get to keep my money but kinda serious. Check is for 6000.  <response>: I believe checks are good for 90 days?, so its probably best to wait a bit. If you are that worried with it though, you could try calling the dealership and asking why they havent processed the check yet. 