The article discusses the key letter of credit (LC) issues tackled in legal cases in the U.S. in 2017, including the pre-honor cases, fraud defenses and injunctions, and post-honor cases. Also cited are the provisions of the Uniform Commercial Code (UCC) on the issues, as well as the cases including "Systems, Inc. v. Woori Bank," "Indoafric Exports Private Ltd. v. Citibank, N.A.," and "Compass Bank v. Morris Cerullo World Evangelism."