Wis. Stat. § 948.63: Receiving property from a child.

Whoever does either of the following is guilty of a Class A misdemeanor:

(1) As a dealer in secondhand articles or jewelry or junk, purchases any personal property, except old rags and waste paper, from any child, without the written consent of his or her parent or guardian; or

(2) As a pawnbroker or other person who loans money and takes personal property as security therefor, receives personal property as security for a loan from any child without the written consent of his or her parent or guardian.