N.Y. General Business Law § 93: Duplicate receipts must be marked "duplicate

§ 93. Duplicate receipts must be marked "duplicate." A person

mentioned in sections ninety and ninety-one, who issues any second or

duplicate receipt or voucher, of a kind specified in those sections, at

a time while a former receipt or voucher for the merchandise specified

in such second receipt is outstanding and uncanceled, without writing

across the face of the same the word "duplicate," in a plain and legible

manner, is guilty of a misdemeanor.