A stop payment order is the revocation of a check. The check writer notifies the bank that the check should not be honored and the check is thereafter treated as non-negotiable (e.g., it is refused). Note that certified or paid checks cannot be stopped. Most financial institutions charge a hefty fee for each stop payment order. On the other hand, if a financial institution honors a check after a stop payment order, in most cases the financial institution is liable for the monies paid out.