In basic terms, a Documentary Credit (DC) is an undertaking by a bank to make payment, provided the terms of the DC are met. There are several types of DC – the main difference is that some are more suited to transactions involving middlemen or traders.
DCs can be irrevocable or revocable. With a revocable DC, the buyer can change or cancel it after issuance. You should always insist on an irrevocable DC so that it can’t be cancelled without your consent.
An export DC makes it easier to obtain pre-shipment finance in the form of a packing credit, or post-shipment finance where the documents under the DC are negotiated.