The bank provides collection service or purchase / discount Export Bills under L/C to allow exporters to use the money before actually receiving payment or before the payment due date from a overseas buyer. After the exporter sends the goods, prepares all required documents require under the L/C and submits them to the bank, the bank will check all documents for completeness and accuracy as per requirement stated in the L/C and submits the documents to the bank that issue the L/C.