In a transaction conclued on CIF terms with L/C as the payment term, with a view to safe collection of payment, the exporter should urge the importer to ________ the opening of L/C. Up receipt of the relevant L/C, the exporter must check the L/C aganist the sales contract carefully to ensure all terms and conditions in L/C are in strict conformity with those in the sales contract. If any __________ are found, the exporter should urge the importer to _______ the L/C as quickly as possible.