#letter_of_credit  a document issued by a bank that guarantees the payment of a customer's draft; substitutes the bank's credit for the customer's credit
  supertype:  document.communication  credit
  subtype:  commercial_letter_of_credit  a letter of credit given to a business concern for commercial purposes
  subtype:  traveler's_letter_of_credit__traveller's_letter_of_credit  a letter of credit given to a traveler
     subtype:  traveler's_check__traveller's_check__traveller'scheck__banker's_check  a letter of credit issued by a bank or express company that is payable on presentation to any correspondent of the issuer

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