Covid-19 update: Our rehoming centres in England will be closed to the public until lockdown lifts in early December. We’re still rehoming and taking in dogs, with increased social distancing measures in place to keep our staff and adopters safe.

Frequently asked questions about microchipping

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Your questions answered

What is a microchip?

A microchip is a small electronic chip, around the size of a grain of rice, which is implanted under the dog's skin and contains a unique number that can be read by a scanner.

The dog owner's contact details relating to each number are logged on a central database, so should the dog ever go missing or be stolen it can be scanned by the authorities and returned to his owner swiftly and safely. It is vital that the owner takes responsibility for updating their details with the database should their circumstances change.

How do I update my dog's microchip details?

It is important to remember to keep your dog’s microchip details. If you move to a new house or change your phone number, you must contact your microchip database provider to let them know. Every year, thousands of stray dogs are unable to be reunited with their owners because their tag and chip details are not up to date. Not only it is a legal requirement to ensure that your contact details are up-to-date, but the microchip is useless without them.

It’s simple to update the details for your dog’s microchip; you can do it online, by telephone or by post – depending on which database your chip is registered to. Charges for updating your contact details will vary across microchip database providers.

If you are unsure of who your microchip provider is, please contact one of the below databases who will be able to tell you who you are registered with or try If you do not know your dog’s microchip number, you will need to have your dog scanned at a vets or alternatively by one of our campaign teams at a Community Event.

 UK Microchip Databases

Why is Dogs Trust offering free microchipping?

Microchipping is now compulsory in the UK, which we have long campaigned for.

A microchip is the most effective way of ensuring lost or stolen dogs get reunited with their family. We want to help as many people as possible comply with the new law by helping to provide the procedure free of charge.

How do I go about getting my dog microchipped?

Our teams visit areas within London, Wales, Scotland, Northern England and Northern Ireland to offer free microchipping as a part of our Checkup & Chip events. Click here to find out where your nearest event is.

Your vet will also be able to microchip your dog if you cannot attend an event, but are likely to charge a fee. We also offer free microchipping at our rehoming centres ( excluding Basildon, Essex). All you need to do is ring up and make an appointment at your nearest centre.

Dogs Trust also microchips all dogs that come into our Rehoming Centres before they are rehomed.

How and where is the microchip implanted?

Using a specially designed implanting device, the microchip is injected through a sterile needle under the dog’s skin between the shoulder blades.

Will it hurt my dog?

No, it does not hurt the dog. No anaesthetic is required and the procedure should cause no more discomfort than a standard vaccination.

How are the owners traced?

If a stray dog is found to have a microchip, the local authority, vet practice or animal welfare organisation will contact the national 24 hour database to find the owner’s details. The owner can then be contacted and reunited with their dog.

What's the law around microchipping?

From the 6th April 2016, all dogs are required by law to be microchipped. The chip needs to be linked to the owners current contact information to be compliant. Your dog will still need to wear a collar and tag that states the name and address of the owner when in a public place, even if microchipped.

Do I need to microchip my puppy?

If you have bought a puppy from a breeder, it is important that you apply for a transfer of keepership and register the puppy's microchip details to your name and address. You will need to contact the correct microchip database to change the details.

It is a legal requirement for all breeders of puppies to microchip and register their own details prior to sale. The microchip MUST at first be registered to the breeder and it is breaking the law if the breeder offers to chip and register directly into your name. 

Find out more about how to buy a dog responsibly.

Do I have to pay to update my details?

Yes, you may have to pay a fee every time you amend your contact details to the database. Most databases offer a premium service which often works out cheaper over the course of your dog's life. Check with your provider for more details.

Is there a fine/penalty if I don’t get my dog microchipped?

All dogs aged 8 weeks and over must now be microchipped (as of 6th April 2016). To be considered as microchipped, a microchip must have been implanted into your dog and your details recorded on an approved database. If your dog does not have a microchip, or if your current details are not recorded on an approved database, you may be served a notice giving you 21 days to comply. If you do not comply with the notice, you could face a fine of up to £500 on conviction. Alternatively an enforcer, such as a dog warden, may seize your dog, microchip it and register the details and then recover the cost from you.