New Jersey Criminal Laws

2C:20-6.     Theft of property lost, mislaid, or delivered by mistake

A person who comes into control of property of another that he knows to have  been lost, mislaid, or delivered under a mistake as to the nature or amount of  the property or the identity of the recipient is guilty of theft if, knowing  the identity of the owner and with purpose to deprive said owner thereof, he  converts the property to his own use.