A microchip only works if the contact information at the registry matches the phone number you actually answer. The most common cause of "the chip didn't help" lost-pet cases is not a scanner failure or a chip migration — it is stale registry data. The previous owner's phone, the disconnected number from two moves ago, the email address that nobody checks anymore. This post is the practical schedule for keeping your pet's microchip information current, and what to do when life events happen that affect it.
The short version
You should update your pet's microchip registry information:
- Within 30 days of adopting (transfer ownership from shelter or previous owner to you).
- Within 30 days of any move to a new address.
- Within 30 days of any phone number change.
- At least once a year for a quick contact-info verification, even if nothing has changed.
- Immediately after a major life event affecting the household (divorce, death of a co-owner, the pet changing hands within the family).
Total time investment per update: 5 minutes. Cost: free for almost all major registries.
Step 1: Know which registry has your pet's chip
If you don't know which registry your pet is registered with, the AAHA Universal Pet Microchip Lookup is the single source of truth. Type the chip number, and AAHA tells you which of the participating registries (AKC Reunite, HomeAgain, 24PetWatch, AVID PETtrac, Save This Life, Found Animals, and a few dozen others) has the chip on file.
If you adopted from a PawMates Pro shelter, the chip number is also stored on your pet's profile in your adopter dashboard, so you don't have to dig through paperwork to find it.
Step 2: Transfer ownership at adoption
This is the single most-skipped step in pet ownership. The shelter chipped the pet and registered it to themselves, the breeder, or the previous owner. At adoption, the chip number was on your paperwork. If you never logged into the registry to claim the chip in your name, the registry is still calling the previous owner when your pet is found.
The fix takes about 5 minutes:
1. Use the AAHA lookup to identify the registry.
2. Go to the registry's website and create an account (or log in).
3. Find "Transfer Ownership" or "Add a Pet" depending on the registry's flow.
4. Enter the chip number, your contact info, and (where supported) a backup contact.
5. Save and verify.
If your shelter pre-registered the chip to your account at finalization (some PawMates Pro shelters do this), you may only need to verify the data is correct.
Step 3: Update on every move
Address changes are the second-most-common stale-data culprit. The first time you change utility companies after a move, add the registry to your update list. The exact steps:
1. Log in to the registry.
2. Update your address, primary phone, secondary phone, and email.
3. Verify the update went through (most registries email a confirmation).
4. If you have multiple pets, update each one's profile separately — they may not be linked.
Step 4: Update on every phone number change
A new cell phone number, a new work number, an old number that is being disconnected: any of these is a registry update. The same five-minute process.
Step 5: Annual verification
Even if nothing has changed, log in once a year and confirm everything is correct. Many people change a phone number, an address, or a backup contact without realizing the registry needs a separate update. An annual check catches what would otherwise be a silent stale-data problem. A reasonable trigger: every January 1, every Daylight Saving Time change, or every birthday — pick a recurring date and put it on your calendar.
Step 6: Major life events
A few specific situations require an immediate update:
- Divorce or separation. If the pet stays with one party, the registry should reflect that party as the owner. Joint registrations get messy if the pet is later lost and the registry calls both numbers.
- Death of a co-owner. Update the contact list to remove the deceased and add a new backup contact.
- Pet given or sold to another family member. Transfer the chip to the new owner's name. The new owner needs to actually be the one the registry calls.
- Moving abroad. International registries vary; some require re-registration. Check the destination country's pet-import rules.
- The pet has died. Most registries have a process for marking a pet as deceased, which prevents accidental call-backs and helps the registry maintain accurate population statistics.
Step 7: Add backup contacts
Most major registries allow 2 to 3 backup contacts on a single chip record. Add at least one:
- A spouse, partner, or family member.
- A trusted friend who could answer if you cannot.
- A second phone number for yourself (work, landline) if you have one.
Backup contacts close the gap when your primary number rings to voicemail or your phone is in the storm-flooded basement during the disaster that separated you from your pet.
What about the PawMates side?
The chip number lives at the registry. Your contact information for lost-pet recovery is the registry's job — that is the lookup chain that produces the phone call, and it is independent of any shelter management software.
Separately, your PawMates adopter dashboard keeps your contact information for the shelter network: the phone the shelter would call about adoption matters, return processes, lost-and-found alerts among PawMates shelters, foster opportunities, and ongoing communications. Update both. They are different systems serving different purposes.
If you adopted through a PawMates Pro shelter, the chip number is captured on your pet's profile at intake — so you have a permanent record of which chip is on which pet, even if you misplace the original adoption paperwork. For a deeper explanation of how the shelter, registry, and lifetime medical record fit together, see reinventing the microchip.
The 5-minute checklist
Set a calendar reminder for the same date every year. When it fires:
1. Log into your microchip registry.
2. Verify primary phone, secondary phone, email, and address.
3. Confirm backup contacts are still reachable.
4. If you have moved, update.
5. Update your PawMates adopter dashboard at the same time.
6. Done.
Five minutes a year is the difference between getting your pet back when something goes wrong and finding out, the hard way, that the chip number was registered to a phone you stopped paying for in 2019.
For the foundational case for chipping at all, see why microchipping your pet is critical. For what to do in the first hour after a pet goes missing, see lost pet recovery. For more adopter resources, browse the PawMates blog.