Documentary letters of credit or documentary drafts are often used to protect the interests of both buyer and seller. These two methods require that payment be made based on the presentation of documents conveying the title and that specific steps have been taken. Letters of credit and drafts can be paid immediately or at a later date. Drafts that are paid upon presentation are called sight drafts. Drafts that are to be paid at a later date, often after the buyer receives the goods, are called time drafts or date drafts.

Since payment by these two methods is made on the basis of documents, all terms of payment should be clearly specified in order to avoid confusion and delay. For example, "net 30 days" should be specified as "30 days from acceptance." Likewise, the currency of payment should be specified as "US$30,000." International bankers can offer other suggestions.

Banks charge fees - based mainly on a percentage of the amount of payment - for handling letters of credit and smaller amounts for handling drafts. If fees charged by both the foreign and U.S. banks are to be applied to the buyer's account, this should be explicitly stated in all quotations and in the letter of credit.

The exporter usually expects the buyer to pay the charges for the letter of credit, but some buyers may not agree to this added cost. In such cases, the exporter must either absorb the costs of the letter of credit or risk losing that potential sale. Letters of credit for smaller amounts can be somewhat expensive since fees can be high relative to the sale.