Forgery in the second degree. (1) A person commits the crime of forgery in the second degree if, with intent to injure or defraud, the person

(a) Falsely makes, completes or alters a written instrument; or

(b) Utters a written instrument which the person knows to be forged.

(2) Forgery in the second degree is a Class A misdemeanor. [1971 c.743 §152]