A.R.S. § 47-3401: Signature

A. A person is not liable on an instrument unless:

1. The person signed the instrument; or

2. The person is represented by an agent or representative who signed the instrument and the signature is binding on the represented person under section 47-3402.

B. A signature may be made:

1. Manually or by means of a device or machine; and

2. By the use of any name, including a trade or assumed name, or by a word, mark or symbol executed or adopted by a person with present intention to authenticate a writing.