American bank to pay against a letter of credit issued by a foreign bank . Confirmed letters of credit protect exporters against the risk of nonpayment . The most secure form of payment is a letter of credit that is both confirmed and irrevocable . Documentary Credits and Collections Exporters can also make use of sight (immediate ) and term (deferred ) documentary credits . A documentary credit calling for a sight draft means that the exporter is entitled to receive payment on sight , i .e...











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