13 GCA § 3401
Signature
View official PDF ↗(1)No person is liable on an instrument unless his signature appears thereon.
(2)A signature is made by use of any name, including any trade or assumed name, upon an instrument, or by any word or mark used in lieu of a written signature.
Reconstructed from the Guam Code Annotated. For the authoritative version, see the official PDF.