Update Your Cat’s Microchip Details

To check and update your cat’s microchip details, find the chip number, identify the registry holding its record, and confirm that the registration lists your current contact information. Make changes directly with that registry, then check that they were saved. If you do not know the number, ask your veterinary team to check their records or arrange a scan.

A readable chip and an accurate registration are different parts of the same identification system. A scan can establish the number in your cat; it does not, by itself, confirm that a registry can reach you. Likewise, updating your address at the veterinary clinic does not establish that a separate microchip database has changed.

This guide covers the administrative check for a cat you care for. It does not explain how to implant, remove or replace a chip, and it is not a substitute for a missing-cat search if your cat has already disappeared.

Understand Which Record You Are Updating

The American Veterinary Medical Association’s microchip guidance explains that an identification microchip contains a unique number. A compatible scanner reads that number. Registration connects it with information held by a registry, including the caregiver’s contact details.

Changing your phone number in that registration does not usually involve changing anything inside the cat. You are correcting the database record linked to the number, not programming a new address into the implanted chip.

Keep three records separate in your mind:

The implanted chip: the identification number read from the cat.
The registry record: the contact information associated with that number.
Other household records: veterinary accounts, insurance, licensing where applicable, adoption paperwork and any visible identification.

Some organizations help with registration, but do not assume that changing one record updates every other system. Confirm what has actually been completed, especially after an adoption, a move or a change of caregiver.

A standard identification microchip is not a GPS tracker. Checking its registration will not show your cat’s current location. Accurate information supports the process of contacting you after someone finds and scans the cat; it cannot guarantee that this sequence will happen.

Gather the Information You Already Have

Start with your cat’s adoption documents, microchip certificate, previous registry messages and veterinary records. Look for the chip number and the name of the company or database holding the registration. A manufacturer’s name on a document may be a useful lead, but it is not always the same as the registry currently holding your contact details.

Collect the current phone number, email and address you want the registry to use. If its system allows another contact, choose someone who agrees to that role and knows which cat the record concerns. Ask them to confirm their details rather than copying an old number from memory.

For a multi-cat household, work on one cat at a time. Keep the cat’s name and identifying description beside the number as you compare documents. Similar adoption dates or matching folders can make it surprisingly easy to open the wrong record.

Do not publish a photograph of the whole certificate to ask strangers for help. It may include your address, contact information or account details. Use the registry’s official support route if you need to supply documentation.

You do not need to buy a scanner to complete this check. Veterinary teams and appropriate animal-welfare organizations may be able to help retrieve the number. Call first to ask what they offer and how to bring your cat in safely.

Confirm the Microchip Number

If You Have Clear Paperwork

Copy the number carefully and compare it with the original a second time. Preserve every digit, including any leading zero. Avoid relying on a cropped photograph or a partially legible handwritten note.

Do not “correct” a number just because its length differs from another cat’s. Chip formats vary. The AVMA notes that ISO-standard chips use a 15-digit number, while other formats are also in use. A website that expects a particular format may not be the right starting point for your cat’s chip.

If different documents show different numbers, ask the veterinary team to reconcile them with a scan and the available history. Do not choose the number that produces the most convenient search result or delete an older record before the discrepancy is understood.

If You Have No Number or Uncertain Records

Ask the clinic whether a microchip number is recorded in your cat’s file. Tell them if the paperwork is missing, belongs to a previous caregiver or conflicts with another document. They can advise whether a scan is needed to confirm the physical chip.

Arrange the visit with the team rather than attempting to restrain a distressed cat for a home experiment. Our guide to preparing your cat for a vet visit covers carrier preparation and sharing handling concerns with the clinic.

Ask for the confirmed number in writing, then check that it has been associated with the correct cat. A clinic’s scan and your subsequent registry check answer different questions; plan to finish both parts.

The AVMA also recommends asking for a scan during routine checkups to confirm that the chip is present and functioning. If a scan does not find a chip, let the veterinary team investigate. A failed reading or a failed website search is not a reason to arrange another implant without professional assessment.

Find the Registry Holding the Contact Record

If your original paperwork identifies a registry, start at its official website or verified support contact. An old email can help you identify the company, but navigate carefully before entering account information, particularly if the message asks for payment or urgent action.

If you know the number but not the registry, ask your veterinarian or use an appropriate registry-lookup service for your location. Coverage varies between countries and between services. A tool with “universal” in its name should not be assumed to search every database worldwide.

A United States Example: AAHA’s Lookup Tool

The AAHA Pet Microchip Registry Lookup primarily serves chips distributed in the United States. It checks participating registries and returns companies to contact. It does not display the owner’s private contact information, register a chip or let you edit the registration.

Enter the number according to the tool’s instructions. AAHA currently accepts 9-, 10- or 15-digit numbers without spaces or punctuation. If several registries are returned, AAHA directs users to start with the first company listed and work through the results to establish who holds the relevant information.

A result may sometimes identify a manufacturer or distributor rather than a completed owner registration. Treat it as a lead to follow up, not proof that your phone number is correctly recorded.

Once you identify the appropriate registry, leave the lookup tool and use that registry’s own account or support process. Searching the number again in AAHA cannot show whether you typed your new phone number correctly in the private record.

Elsewhere, Use the Appropriate Local Route

Cats Protection’s microchipping guidance describes the same practical sequence for UK caregivers: obtain the number, identify the database and contact that database to update your details. Its page links to a UK lookup route when the original paperwork is unavailable.

For another country, your veterinary team or the relevant official local guidance can help you identify the appropriate system. Do not assume that a registry appearing in a search advertisement is the required or most useful place for your existing chip.

Registration rules, accepted databases and legal responsibilities depend on location. Check the current official requirements where you live if compliance is part of your question. This guide does not apply one country’s deadline, approved-database list or transfer process to everyone.

Open the Correct Cat’s Registry Record

Use the registry’s sign-in or account-recovery process. If you have lost access to an old email address, contact its support team and ask how to verify your identity and relationship to the cat. Do not create a second account immediately in the hope that it will replace the inaccessible record.

Before editing, compare the microchip number in the account with the confirmed number you gathered. Also check the cat’s name and description. A familiar name alone is not enough, especially where a rescue used a different name or two household cats have similar profiles.

If the record is still connected with a previous caregiver, rescue or breeder, use the registry’s transfer procedure. Explain how the cat came into your care and provide the documents it requests through its official channel. Do not enter another person’s credentials or represent yourself as that person.

A transfer request may require action from more than one party. Ask the registry what is pending and how you will know when the process is complete. Having adoption paperwork or submitting a form does not establish that the live contact record has already changed.

If there is a dispute about the cat, ask the registry and the appropriate local authority about the correct process. An online registration edit is not a way to resolve a legal disagreement. Keep this administrative task separate from any ownership determination.

Update the Details That Help Someone Reach You

Review each contact field offered by the registry. The aim is to make the record useful if someone needs to contact you unexpectedly, not merely to make the page look complete.

Check:

Your name and any required caregiver or keeper information.
The main phone number, including an appropriate country code when the form requires it.
Your current address and any separate mailing-address field.
An email address you can still access.
Any permitted alternative or emergency contact, with that person’s agreement.
The cat’s identifying details, where the registry allows corrections.

Follow the form’s instructions rather than forcing information into an unrelated field. For example, putting a new phone number in a notes box may leave the main contact number unchanged. Ask support if the system cannot represent your circumstances clearly.

Check whether editing an account profile also updates each pet’s registration. Some pages distinguish account information from the details associated with an individual animal. Use the registry’s explanation and inspect the final cat-specific record rather than assuming those views are identical.

When moving, keep a working phone number and accessible email in place throughout the transition. Ask the registry how to handle address changes if the move is not complete yet. Avoid leaving an obsolete contact as the only way to reach you while deciding when to change the address.

For the wider relocation plan, see How to Move to a New Home With Your Cat. Correcting the registry is one part of that preparation; secure doors, carriers and arrival arrangements still matter.

Save the Change and Confirm the Result

Finish the registry’s required submission steps. Filling fields, starting a transfer or placing a service in a basket does not necessarily save the registration. Look for the confirmation the service provides and complete any legitimate verification it requires.

Then reopen the cat’s record, if the system allows you to view it, and check the saved information. Compare the number, phone, email and address against your intended details. If a transfer is pending or the page does not show the information, ask support how to obtain confirmation.

Keep a concise private record of the outcome:

Cat’s name and confirmed microchip number.
Registry name and official contact route.
Date the registration was checked or updated.
Confirmation reference or saved confirmation, if supplied.
Any outstanding action and who needs to complete it.

Store this with other essential pet records somewhere you can find it during a move or an emergency. Keep passwords in an appropriate password manager rather than writing them in a document shared with every caregiver.

Check each cat separately. A successful update for one animal is not evidence that every record in the same account has changed. Similarly, a confirmation email about your account may not confirm a requested transfer for a particular chip.

If the registry gives a processing timescale, note it and follow up when appropriate. Do not assume a universal instant-update rule or a fixed waiting period across different databases.

Resolve Common Problems Without Guessing

The Lookup Returns No Registry

Check the number against the original and confirm that the lookup accepts that format and serves the relevant location. A missing result can have several explanations, including limited registry participation or an incomplete registration.

Contact the veterinary team, implanting organization or documented manufacturer for help tracing the record. A blank lookup result does not prove that the cat has no chip, that the chip has failed or that no registration exists anywhere.

The Lookup Reports a Failed Search

AAHA distinguishes a failed search from a completed search result: it means a registry could not be checked. Follow the service’s instructions and contact the known registry directly when you have its details. Do not convert an unavailable result into a confident conclusion about registration status.

More Than One Registry Appears

Ask the listed companies which records they hold and what information needs updating. Do not assume that the most recent listing has automatically erased every earlier entry. Keep your notes clear so that you know which companies you contacted and what each confirmed.

Avoid creating extra registrations without understanding the existing situation. Ask the relevant provider or veterinary team how to keep the record useful and current within the systems that apply to you.

The Registry Has Closed or Changed Service

Seek current guidance from the veterinary team and the relevant lookup or registry service. A company closing does not, by itself, mean the implanted chip must be replaced. The administrative problem may require registration with an appropriate operating service.

Confirm the new arrangement and retain the existing number unless a veterinarian identifies a separate reason for action. Do not rely on an old login page or an undelivered support email as evidence that your contact details remain accessible.

The Website Asks for Payment

Read what the charge covers. Cats Protection notes that some databases charge for changes, with arrangements varying by provider. Registration, an information update, a transfer and optional recovery services may be presented separately.

Check the provider’s current terms or ask support which step is necessary for your existing record. Do not assume every update is free, every subscription is compulsory or every premium offer replaces the need to correct your contact details.

Keep the Record Useful After Today

Review the registration after a phone-number, email, address or caregiver change. A recurring reminder can also help catch details that have become outdated gradually. The AVMA’s annual Check the Chip Day is one prompt, but a known change should be handled when it occurs.

If your cat is already missing, contact the registry promptly to confirm your details and ask about its missing-pet process while pursuing an appropriate search. Our runaway-cat guide covers the broader response. Do not wait for an administrative query to finish before taking other necessary steps.

Visible identification has separate benefits and limitations. Should Your Cat Wear a Breakaway Collar? explains that individual decision. A collar, microchip and escape-prevention routine perform different jobs.

Your useful endpoint is simple: a confirmed chip number, a known registry, current reachable contacts and a saved confirmation of what is complete. If one part remains unresolved, record the specific next action rather than marking the whole task finished.

How to Check and Update Your Cat’s Microchip Details