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 section 47-5108, subsection E.
A.R.S. § 47-5104
Formal requirements
Known as the Uniform Commercial Code
The act spans §§ 47–47 (86 sections).
Official source: Arizona State Legislature. Reproduced from public-domain Arizona statutes; confirm against the official source for the current text. Not legal advice.