New Jersey Statutes Title 4. Agriculture and Domestic Animals 4 § 19-15.32

a. When a cat or dog is put in the custody of and impounded with a shelter, pound, or kennel operating as a shelter or pound, or an animal rescue organization facility receives a cat or dog, the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility shall, if the identity of the owner is not known, scan the animal for microchip identification, provided the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility has such technology available.

b. Prior to release of any cat or dog for adoption, transfer to another facility or foster home, or euthanasia of the cat or dog, the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility shall, if the identity of the owner is not known, scan the cat or dog for microchip identification, provided the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility has such technology available.

c. If either scan required pursuant to subsection a. or b. of this section reveals information concerning the owner of the cat or dog, the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility shall immediately seek to contact and notify the owner of the whereabouts of the cat or dog. Furthermore, if microchip identification is found, the shelter, pound, kennel operating as a shelter or pound, or animal rescue organization facility shall hold the animal for at least seven days after the notification to the owner.