Microchip vs Smart Tag: Does My Pet Need Both?
A question we hear often: “My dog is microchipped — do they really need a tag as well?” The short answer is yes, and understanding why comes down to understanding what each technology actually does.
What a microchip does
A microchip is a passive RFID device implanted under your pet’s skin. It stores a single 15-digit identification number. That’s it.
The number can only be read by a specialist scanner — the kind used by vets, RSPCA officers, and rescue centres. It links to a registration database where your contact details are stored.
So the chain is: someone finds your pet → takes them to a vet or rescue → vet scans the chip → looks up the number → calls you.
That chain works. But it has friction: the finder needs to take your pet somewhere with a scanner, which means time, effort, and the decision to do so.
What a smart tag does
A smart NFC + QR tag is a small tag on your pet’s collar. When a finder taps it with their phone (NFC) or photographs the QR code with their camera, they are immediately taken to your pet’s contact page in their browser — no app, no scanner, no friction.
From that page, they can call or message you with one tap. The whole process takes about 10 seconds.
A smart tag is designed for the most common scenario: a member of the public finds your pet and wants to return them as quickly as possible.
The gap each one fills
| Scenario | Microchip | Smart Tag |
|---|---|---|
| Vet or rescue scans found animal | ✓ | — |
| Member of public finds pet | — | ✓ |
| Pet found after dark, no scanner nearby | — | ✓ |
| Pet found in another town or country | ✓ (if chip registered) | ✓ |
| Collar comes off or is lost | ✓ | — |
| Pet needs medical info shared instantly | — | ✓ |
UK law requires both for dogs
Dogs in the UK are legally required to be microchipped (since 2016) and to wear a collar tag with the owner’s name and address (Control of Dogs Order 1992). These are two separate legal requirements — complying with one doesn’t satisfy the other.
For cats in England, microchipping has been mandatory since June 2024. Collar tags are not legally required for cats, but are strongly recommended for the reasons above.
They’re not competing — they’re complementary
Think of it this way: the microchip is your safety net if everything else fails. The smart tag is your first line of contact when everything goes right — when a neighbour finds your dog in their garden and wants to get them home in the next 5 minutes.
The best protection for your pet is both: a microchip on an up-to-date database, and a smart tag that lets any finder reach you instantly without needing a scanner, an app, or a vet visit.
With Taggzi Pro, you also get a Verified Owner badge — shown in the app when you go to collect your pet. It gives finders confidence that they’re handing back to the right person, not just someone who happened to see the lost pet post.
