Please do not write an overly long answer. A short and real answer to the question will suffice.

A buyer and seller sign a sales contract for the sale of office furniture. Your bank issues letter of credit for the account of the buyer. Documents are presented that comply with the terms of the letter of credit. Your bank makes payment, however the applicant claims that the seller has violated the terms of the sales contract, and therefore, should not have been paid. Specifically, the sales contract stated that the furniture should be shipped preassembled. However, the furniture was shipped unassembled. How should your bank respond