The Created Export L/C contract can be closed at any time for several reasons.
For closing L/C, there should not be any open liabilities from unpaid sets of documents or any open subcontracts including transfers.
To Close an existing Export L/C contract, LETCAN transaction is used.
Select it from the menu item[Export Products -> Export L/C -> Other -> Close].
When you have made your changes, click on the ( ) Save function to save all the the data entered in the transaction to the database.