This document provides instructions for voiding unused checks in the SAP system. It describes how to void a check that was accidentally damaged before being used for payment. The steps are to access transaction code FCH3 for voiding unused checks, enter the relevant company code, bank, account, and check number, select the void reason code of "Destroyed/unusable", and click the Void button to complete the process. This voids the check so it cannot be used for payment.