Can I register a microchip I didn't buy — one a breeder, shelter, or previous owner had implanted?
Registries care about one thing: whether the chip's ID number is correctly linked to accurate, current owner information. Where the physical chip came from — a breeder, a shelter, a rescue, a previous owner — doesn't factor into whether it can be registered.
Where do I find the chip number if I didn't do the implanting?
Check any paperwork you received when you got the pet — an adoption packet, a breeder's take-home documents, or a vet discharge summary often lists it. If there's no paperwork, any vet, shelter, or animal-control office should be able to scan the pet and read the number back to you for free.[1]
Do breeders or shelters usually register the chip themselves?
Some breeders and shelters register the chip under their own information before handoff, intending to transfer it to the new owner afterward. Others leave the chip unregistered and expect the new owner to register it directly using the number from the paperwork.
What if the chip is already registered to someone else?
A breeder, shelter, or previous owner may already have the registration, in which case they should transfer it to you. See Transfering a registration.
What if I got a pet from a previous owner without any paperwork?
Start with a scan at any vet or shelter to get the chip's ID number, then run it through the AAHA Universal Microchip Lookup Tool to see whether it's registered anywhere.[2] If it is, contact that registry about transferring it to you. If it comes back unregistered, you're free to register it directly — the absence of paperwork doesn't block registration, since all a registry needs is the number itself.
Sources
- Microchipping: FAQs for pet owners American Veterinary Medical Association
- Universal Pet Microchip Lookup Tool American Animal Hospital Association