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Found an old un-cashed paycheck. How long is it good for? What to do if it's expired?
The two banks involved may have different policies about honoring the check. It might not be written on the check.  Your bank may decide that the stale check has to be treated differently and will withhold funds for a longer period of time before giving you access to the money. They will give time for the first bank to refuse to honor the check. They may be concerned about insufficient funds, the age of the check, and the fact that the original account could have been closed. If you are concerned about the age of the check. You could go to your bank in person, instead of using deposit by ATM, scanner, or smart phone. This allows you to talk to a knowledgeable person. And if they are going to treat the check differently or reject the check, they can let you know right away. The audit may not have been concerned about the fact that the check hadn't been cashed because when they did the audit the check was still considered fresh. Some companies will contact you eventually to reissue the check so you they can get the liability off their books.  If the bank does refuse the check contact the company to see how you can get a replacement check issued. They may want proof the check can't be cashed so they don't have to worry about paying you twice.