The pet I found is wearing a collar or tag — what do I do?
If the pet you've found is wearing a collar, read every tag on it before you do anything else. A tag with a phone number or QR code means you can reach the owner in the next minute, and a rabies tag, municipal licence tag, or registry tag each carries a number that traces back to an owner. This is the fastest route home available to a found pet, and it needs no equipment and no appointment.
Tags are also the piece finders most often under-use. In a study of people who found lost pets, tag information accounted for 10% of successful reunions — a meaningful share, given how many found animals wear no collar at all.[1]
What kinds of tags might be on the collar?
Four kinds turn up, and they work differently:
| Tag | What's on it | What to do |
|---|---|---|
| Registry tag | A short ID, sometimes a QR code, and a registry's web address | Look the ID up on that registry's site |
| ID tag | Pet's name, owner's phone number, sometimes an address | Call the number. |
| Rabies tag | A serial number and the issuing clinic's name and phone | Call the clinic — they can match the number to the owner's file |
| Licence tag | A number and the issuing town, county, or municipality | Call that municipality's animal-control or licensing office |
A collar with no tags at all still tells you something useful: this animal almost certainly has an owner and is not feral, which is worth mentioning when you file a found report.
The tag has an mChip.org ID or QR code on it
An mChip tag carries a short tag ID and a QR code. Either one goes straight to the pet's record, where you can notify the owner immediately.
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Scan the QR code, if there is one
Point your phone's camera at it. It opens the found-report form for that specific pet — no ID to type, no lookup step.
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Or enter the tag ID by hand
If there's no code, or it won't scan, type the ID from the tag into the tag lookup.
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Submit a found report
The owner is notified immediately and gets your contact information so they can reach you directly.
Holding an mChip tag? The ID on it looks the pet up directly — this is the tag lookup, not the chip lookup.
Look Up a Tag IDTags from other registries work the same way in principle: the web address printed on the tag is where the ID gets looked up. Enter it on that registry's site — a tag ID is only meaningful to the registry that issued it.
The tag has a phone number — what if nobody answers?
Try more than once, and try text as well as voice. An owner out searching for a missing pet may not be near their phone.
If you reach voicemail, leave a message that includes where you found the animal, that it's safe, and how to reach you. If the tag also carries an address, and it's nearby, it's reasonable to walk the pet home — many are found within a few streets of where they live.
If the number is disconnected or wrong, treat the tag as a dead end and move to a microchip scan. A stale phone number on a collar tag has exactly the same failure mode as a stale number on a chip record, and it's common: when the contact information doesn't work covers what to do next.
How do I trace a rabies tag or a licence tag?
These don't carry a name, which makes some finders assume they're useless. They aren't — they're just indirect.
A rabies tag has a serial number plus the name and phone number of the veterinary clinic that issued it. Call that clinic, read them the number, and they can look up which patient it belongs to. They generally won't hand you the owner's details, but they will contact the owner on your behalf, which accomplishes the same thing.
A licence tag carries a number and the municipality that issued it. Call that town or county's animal-control or licensing office and read them the number. Same arrangement: they hold the record and will make contact.
Both work outside of the microchip system entirely, so they're always worth trying in addition to the microchip scan.
Should I take the collar off?
Leave it on. It's the pet's identification, and an animal that slips away from you a second time is far better off wearing it. The only reasons to remove a collar are if it's injuring the animal — too tight, embedded, or caught on something — or if a vet or shelter asks you to.
Do photograph the tags, both sides, before anything else happens. If the collar comes off later, or the animal goes to a shelter, those numbers are the thread back to the owner and you'll want your own copy of them.
The collar has a tag, but I still can't reach anyone
Get the pet scanned for a microchip anyway. Collar tags and chips are independent systems with independent failure modes — an owner who moved and never updated a tag may well have updated the chip record, or vice versa. Where to get a found pet scanned covers where to go and what to ask for.
And file a found report with your local shelter regardless. An owner searching for a missing pet calls the shelter, and your report is what makes that call succeed.
Also have a chip number from a scan? The AAHA Universal Lookup Tool will tell you which registry holds it — and if that's mChip.org, the owner can be notified from here.
Look Up on mChip.orgSources
- Search methods that people use to find owners of lost pets Lord LK, Wittum TE, Ferketich AK, Funk JA, Rajala-Schultz PJ. JAVMA 230(12):1835–1840, 2007