ONE. However, there is a common miss-conception that four or five multiple banks must be involved to manage letter of credit transactions. These multiple banks include credit issuing banks, advising banks, negotiating banks, confirming banks, and reimbursing banks. What is less understood is that these “banks” are functions, not necessarily physical banks. The trade finance functions these banks perform in a transaction can be done by separate banking institutions or by one bank under UCP 600 guidelines (Uniform Customs and Practice for Documentary Credits, ICC Publication 600).