Me. Rev. Stat. tit. 17, § 1667

Any person who, with intent to defraud, issues or aids in issuing a nonnegotiable bill without the words "not negotiable" placed plainly upon the face thereof shall be guilty of a crime, and upon conviction shall be punished for each offense by a fine of not more than $5,000 or by imprisonment for not more than 5 years, or by both. <div