Most people order a dog tag with the dog's name in big letters and a mobile number underneath. It looks right, it is what most engravers' previews show you, and in the UK it does not meet the legal requirement. The law asks for something else, and it has nothing to do with a phone.
- The law: in a public place, your dog must wear a collar with your name and address on it, or on a tag attached to it. That is article 2 of the Control of Dogs Order 1992.
- A phone number is not required, but add one. It is how a finder actually reaches you.
- Your dog's name is optional. If you add it, put it last.
- A QR code on its own does not count. The name and address have to be readable without a phone.
- The penalty: in England and Wales, a fine with no upper limit and up to six months in prison. In Scotland the fine is capped at £5,000, which is where the "£5,000 fine" headlines come from.
What UK law requires on a dog tag
Name and address, not a phone number
The rule is article 2 of the Control of Dogs Order 1992. It says that every dog "while in a highway or in a place of public resort shall wear a collar with the name and address of the owner inscribed on the collar or on a plate or badge attached to it."
Read the wording carefully, because it catches almost everybody out. The law asks for the owner's name and address. It says nothing about a telephone number, and nothing about the dog's name. A tag engraved with "BELLA" and a mobile number, which is the most common tag sold in the UK, does not meet the requirement as written, however useful that number is in practice.
This is less a trap than a sign of the Order's age. It was written when a finder's realistic option was to walk your dog to the address on its collar. Today they will ring you. So engrave for both: the address for the law, the phone number for getting your dog home.
Where the rule applies
"A highway or a place of public resort" is broad. It covers pavements and roads, and in practice parks, beaches, footpaths, pub gardens and anywhere else the public goes. It does not cover your own home or garden, so your dog does not have to wear a collar indoors.
Dog tags
Get a free QR dog ID tag (you just pay delivery), or an engraved tag with your name, address and a QR code.
Do dogs have to wear a collar in the UK?
When they are out in public, yes. The Order is specific that the name and address go on a collar, or on a plate or badge attached to one. That is why so much of the online coverage is framed as a "dog collar law" rather than a tag law: the duty is to have a collar on, carrying the right details.
What about harnesses?
This is the question behind most of the "dog collar rule UK fine" stories. Many owners walk their dogs on a harness for good reasons, especially dogs that pull or have neck or breathing problems. The Order was written in 1992 and does not mention harnesses at all.
The safe reading is simple: walk on the harness if that suits your dog, but keep a collar on as well, with the tag on the collar. The lead can still clip to the harness. Some owners clip the tag to the harness instead; nothing in the Order says that counts, so if you want to be sure you are covered, use a collar.
The fine for not having a dog tag
Breaking the rule is an offence. Article 3 of the Order makes the owner, or whoever is in charge of the dog at the time, guilty of an offence against the Animal Health Act 1981 if the dog is in public without a compliant collar. Because the Order sets no penalty of its own, the general one in section 75 of the Animal Health Act 1981 applies: up to six months' imprisonment, a fine up to level 5 on the standard scale, or both.
| Where | Maximum fine | Why |
|---|---|---|
| England and Wales | Unlimited | Level 5 fines lost their £5,000 cap on 12 March 2015 (section 85, LASPO Act 2012) |
| Scotland | £5,000 | Level 5 on the Scottish standard scale (section 225, Criminal Procedure (Scotland) Act 1995) |
| Northern Ireland | £1,000 | A separate rule with the same wording, level 3 (see below) |
Those are maximums, and the fine a court actually gives is usually far lower. The more immediate risk is in article 4: a dog found in public without a compliant collar can be seized and treated as a stray. A correctly engraved tag is the cheapest way to make sure neither happens.
Which dogs are exempt
Article 2 lists the exemptions, and they are narrow:
- any pack of hounds
- a dog while it is being used for sporting purposes
- a dog while it is being used to capture or destroy vermin
- a dog while it is being used to drive or tend cattle or sheep
- a dog on official duties with the armed forces, HM Customs and Excise or the police
- a dog while it is being used in emergency rescue work
- a dog registered with the Guide Dogs for the Blind Association
Most of these exemptions apply only while the dog is working. A pet dog on an ordinary walk is not exempt, and nor is a working breed on its day off.
Scotland, Wales and Northern Ireland
The Control of Dogs Order 1992 was made for England, Scotland and Wales, so the name-and-address rule is the same across Great Britain. Only the maximum fine differs, as in the table above.
Northern Ireland has its own rule with the same wording. Regulation 6 of the Dogs (Licensing and Identification) Regulations (Northern Ireland) 2012 requires the keeper to make sure the dog wears a collar with the keeper's name and address on it or on a plate or badge attached to it. Northern Ireland also requires every dog to be licensed, which is a separate duty from the tag.
What to put on a dog tag in the UK
What the law asks for and what gets your dog home are two slightly different lists, which is the source of most of the confusion. You want both:
| What UK law requires | What actually gets your dog home |
|---|---|
| Your surname | A phone number someone can ring straight away |
| Your address | A second number, in case the first goes unanswered |
| (a phone number is not required) | Anything urgent: "needs medication", "do not chase" |
How to fit it on
Four short lines are enough. For example:
- J SMITH
- 12 HIGH STREET
- LEEDS LS1 4AB
- 07700 900123
Every one of those lines is 15 characters or fewer, which is what most engraved tags allow per line. If your tag only has room for less, a house number and postcode identify your address precisely and are the usual compromise, although the Order itself simply says "address".
Two details matter more than they sound. Use lettering a stranger can read at arm's length in poor light, because that is how a finder will be reading it. And if your dog needs medication or must not be fed, that belongs on the tag ahead of anything decorative.
Is a QR code tag enough?
Not on its own. A QR tag is excellent at the practical job: whoever scans it sees your contact details and your dog's profile, and can ring or message you in one tap. But the Order wants the name and address on the collar, readable by anyone, phone or no phone. A QR code is not readable without one.
The fix is to have both on the collar. Our engraved dog tags carry up to four lines of engraving on the front, enough for your name, address and phone number, with a QR code on the back, so one tag does both jobs. Or keep the QR tag you have and add a plain engraved tag next to it. You can compare the options on our dog tags page.
Microchipping is a separate legal duty
A microchip does not replace the tag, and the tag does not replace the microchip. They are two separate duties, and you need both.
| Microchip | Collar tag | |
|---|---|---|
| Required for | Dogs from 8 weeks old | Dogs in public, under the 1992 Order |
| Who can read it | A vet, warden or rescue with a scanner | Anyone who finds your dog |
| Speed | Hours to days, because it needs a trip somewhere | Minutes, because the finder rings you |
| Keeping it current | Update the database when you move | Re-engrave, or use a tag you can update |
In England the rule is the Microchipping of Cats and Dogs (England) Regulations 2023: dogs older than 8 weeks must be microchipped and registered on a database. If a dog isn't, an authorised officer can serve a notice to get it chipped within 21 days, and failing to comply is an offence with a fine of up to £500. Wales and Scotland have their own dog microchipping regulations with the same 8-week rule, and in Northern Ireland a dog has to be microchipped before it can be licensed.
Cats are now covered too, in England only. Under the same 2023 Regulations, cats older than 20 weeks must be microchipped, a duty that took effect on 10 June 2024. There is no collar or tag requirement for cats.
Should you put your dog's name on the tag?
The law doesn't ask for it, so this is your call, and there is a genuine argument on both sides.
The case against: a stranger who can read your dog's name can use it. Calling a nervous dog by name makes it far easier to catch and lead away, and it makes a stolen dog easier to pass off as their own. It is not a common crime, but it is not imaginary either.
The case for: a name helps a well-meaning finder calm and hold a frightened dog until you arrive.
Our view: if space is tight, your contact details win, and the dog's name is the first thing to drop. Many trainers and rehoming charities take the same line. Whatever you choose, make the decision deliberately rather than accepting the engraver's default.
What to put on a cat's tag
Cats have no tag law, less space and more risk. A cat tag realistically holds a phone number and little else, so put the number on and skip the name. Use a quick-release or breakaway collar, because a cat that snags a fixed collar on a fence can strangle. Many cats lose collars regularly, which is exactly why the microchip does the legal work for cats and the tag is a bonus.
Outside the UK
The engraving advice above travels well, but the legal requirement does not. Taking your dog abroad from the UK is a separate set of rules (microchip, rabies vaccination and travel paperwork), covered in our UK pet passport guide.
United States
There is no federal law requiring a dog to wear an ID tag. What most owners are subject to is a county or municipal licensing rule, usually alongside a current rabies vaccination tag. Because the detail is set locally and the practical advice differs from the UK, we cover it separately: what to put on a dog ID tag in the US.
Australia, New Zealand and Canada
These generally work on council or municipal registration. You register the dog with your local council, receive a numbered registration tag, and are expected to have the dog wear it. Microchipping is separately mandatory in most Australian states and in New Zealand. Your council's website is the authority, and a registration tag is a reference number, not contact details, so a personal ID tag alongside it is doing a different and equally necessary job.
Two things worth doing today
Look at the tag your dog is wearing right now. Does it show your name and address? If it only has a phone number, it doesn't meet the law. And check it is still readable: thin aluminium discs wear smooth against a collar buckle within a year or two, and a tag nobody can read does nothing. Check the split ring is still closed while you're there.
Check the details are still yours. If you have moved house or changed number since you bought the tag, it is now actively misleading, because it sends a helpful stranger to someone else's door. Our engraved dog tags are £9, with up to four lines for your details and a QR code on the back that links to details you can change from your phone.
For a wider look at the options, see our comparison of dog ID tags. If your dog is missing right now, start with community alerts instead.