how to close payable invoice without paying them

 in Italy we have this requirement: when importing goods from outside European Union, the carrier pays on behalf of our company the custom duty to the Italian custom.

then it bills us the fright costs plus the custom duty.

we have to enter the carrier invoice and pay it (no problem for that).

then we have to enter the custom bill, which is an invoice where supplier is the custom authority.

we have to close it without really haveing a cash disbursment (because it has already been paid by the carrier)

usually we set a dummy bank account, setting as cash account a temporary clearing account.