Specifications for the Bill of Exchange Posting 
Two special automatic postings are created during the bill of exchange posting: The system posts the bill of exchange liability to the special G/L account "Contingent claims from checks/bills of exchange" and automatically creates the offsetting entry on the clearing account for contingent claims from checks/bills of exchange. To make these postings, the system requires posting keys and the number of the clearing account.
To enable automatic posting to the clearing account, you must define the number of the clearing account in the system. You distinguish the clearing accounts by account type together with the special G/L indicator.

For posting to the customer, special G/L and clearing accounts, the posting keys and the special G/L indicator S have already been defined in the standard system.
No further preparations need to be made for canceling the bill of exchange.