In this configuration activity you are able to define additional payment blocks. They are important controlling feature of the procure to payment process in SAP ERP.
IMG Path: Financial Accounting (New) -> Accounts Receivable and Accounts Payable -> Business Transactions -> Outgoing Payments -> Outgoing Payments Global Settings -> Define Payment Block Reasons
Tables: T008, T008T
In the first screen you will see following. You could either create new or modify an already existing one.