A letter of credit, confirmation, advice, transfer, amendment, or cancellation may be issued in any form that is a record and is authenticated by a signature or in accordance with the agreement of the parties or the standard practice referred to in division (E) of section 1305.07 of the Revised Code.
Formal requirements - UCC 5-104
Ohio Rev. Code Ann. § 1305.03, under Chapter 1305 | Letters Of Credit.
Ohio Rev. Code Ann. § 1305.03