First National Bank opened a letter of credit in favor of ABC Co., a U.S. company, for ABC's sale of goods to Country X, a foreign country that participates in a boycott. The letter of credit contains no boycott provisions, but First National Bank knows that ABC Co. has agreed to supply a certification to Country X that ABC has not dealt with any blacklisted firms as a condition of receiving the letter of credit in its favor. What should First National Bank do?