It is a letter of credit or a contractual agreement between financial institute (Bank) and the party to which the letter is handed. The ILOC letter cannot be cancelled under any circumstance and, guarantees the payment to the party. It requires the bank to pay against the drafts meeting all the terms of ILOC. It is valid upto the stated period of time. For example, if a small business wanted to contract with an overseas supplier for a specified item they would come to an agreement on the terms of the sale like quality standards and pricing, and ask their respective banks to open a letter of credit for the transaction. The buyer’s bank would forward the letter of credit to the seller’s bank, where the payment terms would be finalized and the shipment would be made.