Registering a pet microchip links the chip number to the animal and the owner’s contact details. The process varies between countries, but the basic purpose is always the same: helping someone contact you when your pet is found.
Having a chip implanted is not enough on its own. The number must also be entered in the correct registry, and the contact details must stay up to date.
This guide explains the general registration process, how to find the right database and what to do when the rules are different where you live.
What does registering a pet microchip mean?
A pet microchip normally stores only a unique identification number.
Your personal details are not stored inside the chip. They are kept separately in a microchip registry and linked to that number.
A registration record may include:
- The complete microchip number
- The pet’s name
- The type of animal
- The breed, colour and sex
- The owner or keeper’s name
- A telephone number
- An email address
- The home address
- An emergency contact
When a lost animal is scanned, the chip number can be used to find the registry and contact the registered owner or keeper.
Implanting and registering are two different steps
Implanting a chip does not automatically mean it has been registered.
Implanting means placing the physical microchip beneath the animal’s skin.
Registering means creating a database record that links the chip number to the pet and its owner or keeper.
A chip can scan perfectly but still lead nowhere when the registration was never completed.
After your pet is chipped, always ask:
- Which registry will hold the record?
- Who is responsible for completing the registration?
- Has the registration already been submitted?
- Will I receive confirmation?
- How can I check or update the record later?
Who registers the microchip?
This depends on the country, registry and organisation involved.
The registration may be completed by:
- The veterinary clinic
- The breeder
- An animal shelter or rescue
- The previous owner
- The new owner
- An authorised government or municipal service
In some places, only a vet or another authorised professional can submit the initial registration.
Elsewhere, the owner receives paperwork or an online link and must finish the process personally.
Do not assume that someone else has completed it. Check the record yourself once the registration should be active.
Microchip registration rules vary by country
There is no single worldwide registration system or set of rules.
Depending on where the pet lives, there may be:
- One national registry
- Several approved private registries
- Regional or municipal databases
- Different rules for dogs and cats
- Different requirements for imported animals
- A legal deadline for registration
- Rules about who may submit or change a record
Some countries require pets to be entered in a recognised national or approved database. Registration in another private or international database may be useful, but it may not meet the legal requirement.
For example, official UK guidance requires dogs and cats covered by the rules to be microchipped and registered on an appropriate database. The exact rules differ depending on the animal and where in the UK the owner lives.
See the official UK microchipping guidance for a clear example of how country-specific requirements can apply.
Always check the official rules for the country or region where the animal normally lives.
How do I find the correct registry?
Start with the documents provided when the chip was implanted, adopted or purchased.
The registry name may appear on:
- The microchip registration certificate
- The pet passport
- The vaccination record
- Veterinary invoices or records
- Adoption papers
- Breeder documents
- An email or text confirming the registration
When the registry is not listed, search the chip number with ChipTrace.
Depending on the number and available connections, ChipTrace may identify:
- A registry already holding the record
- The manufacturer or supplier
- A likely country or identification system
- Registries that should be checked
- The next organisation to contact
When a manufacturer is identified, it may also be able to tell you which distributor, clinic or registry received that chip range.
What information do I need to register a chip?
The exact requirements vary, but you will usually need:
- The complete microchip number
- The pet’s basic details
- Your full name
- Your telephone number
- Your email address
- Your home address
You may also be asked for:
- Proof of identity
- Proof of address
- An adoption or purchase agreement
- A transfer form signed by the previous owner
- A veterinary certificate
- The pet passport
- Proof that you have authority to register the animal
Never enter false ownership information simply to create a record. When ownership is disputed or unclear, ask the registry, vet, rescue or relevant authority what evidence is required.
How to register a pet microchip step by step
- Confirm the number.
Check the number on the scanner or official paperwork. Do not guess missing digits or add zeros to a shorter chip number. - Find the correct local registry.
Check the implant paperwork, ask the vet or use ChipTrace to identify possible registries. - Check who must complete the registration.
This may be the vet, breeder, shelter, rescue or owner. - Provide the required details.
Enter the pet’s information and current owner or keeper contact details. - Provide proof when requested.
A transfer form, adoption agreement or identity document may be needed. - Pay any required fee.
Some registries are free, while others charge for registration, transfer or premium services. - Wait for confirmation.
Keep the email, certificate or registration reference. - Check the record.
Confirm that the chip appears in the registry and that your contact details are correct.
How long does registration take?
Some online registrations appear quickly. Others may require manual approval or processing by a vet, registry or authority.
When the record does not appear after the expected processing time, contact the person or organisation that submitted it.
Ask:
- When was the registration sent?
- Was it accepted by the registry?
- Is any information or payment still missing?
- Should I receive a confirmation email or certificate?
Do not rely only on being told that the registration was completed. Ask for confirmation and check it where possible.
Can I register an existing unregistered chip?
Often, yes.
A working chip does not normally need to be removed or replaced simply because no registration can be found.
Start by asking:
- The vet that implanted the chip
- The breeder
- The shelter or rescue
- The chip manufacturer or distributor
- The appropriate registry for your country
The registry may ask for proof that you own or are responsible for the animal.
When you have the authority to act, the existing chip number can often be registered correctly.
What if the previous owner is still registered?
A microchip registration does not always change automatically when a pet is adopted, sold or rehomed.
The registry may require:
- A transfer request from the previous owner
- A signed transfer form
- An adoption agreement
- A purchase receipt
- Veterinary records
- Evidence that attempts were made to contact the previous owner
Do not create a conflicting record without first checking the registry’s transfer process.
When the previous owner cannot be contacted, explain the situation honestly and ask what alternative evidence the registry accepts.
How do I register a pet adopted from a shelter or rescue?
Ask the shelter or rescue for the complete microchip information before or during the adoption.
You should receive:
- The full chip number
- The registry name
- Any certificate or registration documents
- Instructions for transferring the record
- Confirmation of who will submit the change
Some organisations complete the transfer themselves. Others expect the adopter to finish it.
Check the registry after the adoption and confirm that your current details are listed.
How do I register an imported pet?
A pet arriving from another country may already have a valid chip and registration abroad.
However, the new country may also require the animal to be entered in a local or approved database.
Before registering an imported pet:
- Confirm that the chip can be scanned
- Keep the original registration details
- Check the import and local registration rules
- Ask a local vet which registry must be used
- Update the foreign registry with your new contact details when possible
Do not delete a useful foreign record until you know whether it is still needed.
In some cases, keeping both the original record and a new local registration can make the pet easier to trace across borders.
Can I register the chip in more than one database?
Yes, a chip number can appear in more than one database.
An additional registration may provide another route back to you when:
- The pet travels internationally
- The local registry is not included in major lookup services
- The original database closes or becomes unavailable
- A finder searches a different international service
However, an extra record should support the correct local registration, not replace it.
Keep the same contact details across all active records and update them whenever something changes. Conflicting or outdated records can slow down the search for an owner.
Can I add my pet to a global database?
Yes. An additional international registration can make a pet easier to trace, especially when the official database is not publicly searchable.
Animal-ID allows owners to create a free basic record using an existing microchip number.
This can be particularly helpful when:
- The national registry can only be accessed by vets or authorised organisations
- The pet travels or moves between countries
- The local database is not included in international lookup services
- A finder does not know which national registry to contact
For example, Greece has a national government register. Pet records are managed by authorised services, including certified veterinarians. A finder outside that system is not be able to perform a simple public chip search. An additional international record can therefore provide another, simpler route back to the owner.
France also uses a national identification file, I-CAD, while Ireland requires dogs to be registered on a database approved by the government. In systems like these, an extra global record can improve visibility outside the main national route, particularly when an animal is found abroad.
However, a global registration does not replace:
- A legally required national registration
- An approved local database
- A municipal or regional registration
- The original registry linked to the chip
Think of it as an extra safety net. Complete the official registration first, then add a global record to improve the chance of the animal being traced across borders.
How do I confirm that the registration is complete?
Do not stop after submitting the form.
Check that:
- You received confirmation from the registry
- The microchip number is correct
- Your name is spelled correctly
- Your telephone number works
- Your email address is current
- The home address is complete
- The pet’s details are correct
You can also search the chip number through an appropriate local or globl lookup service like ChipTrace to see whether the registry is detected.
In the United States, AAHA’s free Microchip Registry Lookup accepts 9-digit, 10-digit and 15-digit chip numbers and identifies participating registries to contact.
A lookup result may identify the registry without displaying your personal details. That is normal and helps protect your privacy.
Keep the registration up to date
A registration is only useful when the contact details are current.
Update the record after:
- Moving home
- Changing your telephone number
- Changing your email address
- Adopting or rehoming the pet
- Moving to another country
- Changing the emergency contact
- The pet dies
It is also sensible to check the registration once a year.
Ask your vet to scan the chip during routine visits so you know that it can still be found and read.
Check the microchip with ChipTrace
When you do not know which registry holds the chip, enter the complete number in ChipTrace.
ChipTrace searches connected registries and lookup services and may identify the manufacturer, number range, likely country or next organisation to contact.