Teflon is a remarkable substance. It has the best resistance to chemical attack of any polymer, and it can be used at any temperature between -73 C and 260 C with no effect on its properties. It also has a very low coefficient of friction.
A stale dated warrant is an unredeemed warrant which was issued more than six months prior to the current date. A stale dated warrant is expired and the original instrument is no longer negotiable.
When is a check considered stale dated and what if the bank pays the item after that time period? The Uniform Commercial Code, section 4-404, has effectively eliminated the old concept of stale dates on checks. However, the status of a check does change somewhat once it is 6 months old. If a check that is more than 6 months old is presented to the paying bank for payment, the paying bank may refuse to pay it without being liable to its customer (the drawer of the check) for so refusing. It may also pay the check if it does so in good faith.