Commercial checks sometimes have instructions on them limiting their validity. The check writer's bank does not usually honor checks beyond their valid date. Government checks are valid one year past their issue date. These include Social Security checks and tax refunds.
When a commercial or government check is not cashed within the appropriate period, the money goes to the state's unclaimed funds department. People who find expired checks can contact the unclaimed funds department to get the money to which they are entitled.Learn more about Currency & Conversions