ISO Compatible Microchips for Pet Travel to the European Union

Microchips can be an understandably confusing part of pet travel, so we've put together a few frequently asked questions to help clear up the most misunderstood aspects of this requirement.

Does my pet need an ISO Compatible Microchip to enter the European Union?

If you’ve looked into any pet import regulations for a country within the EU, chances are you’ve heard the term “ISO compatible” alongside rules relating to microchips. Does that mean you definitely need one if you’re moving your pet to Europe? The answer is a little complicated.

ISO (International Standards Organization) regulations tend to mean different things for different countries, which makes it even more confusing to figure out if your pet’s chip is compliant or not. While we always recommend double checking the specific rules and regulations of your destination country, we know a thing or two that may help with some of the confusion surrounding microchips.

Which microchips will allow entry into the EU?

The technical rule for entry into the EU is to have an ISO compatible chip. There are two fairly common microchip brands that are compatible with ISO regulations for the EU: HomeAgain and the AVID Euro chip (which is 10 digits, instead of the common US 9 digit chip). Take a look at our previous blog posts covering both AVID chips and HomeAgain chips in more detail. 

What if my pet’s chip is not considered ISO compatible?

We have found that when routing through a large Border Inspection Post, such as the Lufthansa Animal Lounge in Frankfurt or the KLM Pet Hotel in Amsterdam, all types of microchips are acceptable. Even if the final stop is not in Amsterdam or Frankfurt, this is where vet inspections and microchip scans occur for entry into the EU. Both of these locations have universal scanners readily available to read any US implanted chip (not just ISO compatible).

With that, keep in mind that the vet clinic at your new destination may not have a universal scanner to read a non-ISO compatible chip. In that case, you may be asked to get a new chip implanted when looking to move again or obtain an EU Pet Passport.

Should I get another chip implanted just to be safe?

While the process of implanting a microchip is typically painless for pets, we do not recommend getting another chip (just to be ISO compatible) if you can avoid it. Here are a few reasons why two chips are not always better than one:

  • Both numbers would need to be listed on all vet documentation just in case one chip is no longer readable (due to malfunction or moving location).

  • The EU requires a microchip to be implanted and scanned prior to a rabies vaccination. With a new chip, your pet would also need a new rabies vaccination to meet import requirements. Again, this is just in case the original chip is no longer readable.

  • The two chips would also need to be continually updated with your contact information. People probably won’t assume that found pets have two microchips, so it’s important to keep contact information up-to-date on both chips to ensure your pet is easily traceable back to you.

In the end, the decision about whether or not to get another chip implanted in order to meet ISO regulations is up to you. We have worked with many pets that have two microchips!

Either way, it’s always a good idea to have your pet’s chip scanned by your vet well in advance to ensure that the chip is working properly, is easy to locate, and the number is recorded correctly for travel.

Ready to discuss your pet's move with a pet travel expert? Contact PetRelocation to set up a consultation today.


PetRelocation Team





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By Krista on May 3, 2017 at 12:12 pm

This still doesn't tell me what I should do when moving my dog from the US to the U.K. He has a microchip however I am told it is not ISO compatible (it's 24PetWatch). If I don't implant a new ISO chip then what are my options for bringing my dog into the U.K. From the US with his existing chip?

By on May 3, 2017 at 1:35 pm

According to the official UK website, you can supply your own scanner ( We've heard of people taping the scanner to the crate, but you may want to reach out to the government office directly to find out what they specifically require. Additionally, it's important to make sure the chip is definitely readable and the number matches all the paperwork. Let us know if you're interested in hiring assistance (our experts would handle the whole process for you) or you can use to find a destination agent to assist you. Hope that helps!

By Natascha Pedersen on August 4, 2017 at 8:20 pm

I have same issue but traveling to Germany., who can I contact at Frankfurt to check whether or not their scanner can read a 10 digit microchip my dog has.Natascha Pedersen

By on August 7, 2017 at 8:57 am

Hi Natascha, thanks for your question. According out our sources, Germany also accepts 10 digit microchips (please see the full requirements here).

For further guidance, we suggest checking the official Germany government website here and perhaps contacting someone via the information provided there if you have further questions.

Hope this helps! Just let us know if we can be of assistance and good luck with everything.


By Haley on September 14, 2017 at 6:52 pm

I read that 24PetWatch IS ISO compatible if it has the fifteen digit code that starts 982, is this true?

By on September 15, 2017 at 2:10 pm

Hello Haley, thanks for your question!

Yes, the 15-digit 24PetWatch microchip is considered ISO compliant, since it meets the standard frequency of 134.2 kHz. Keep in mind that it is still important to ensure the chip is readable and that the number is correctly recorded on all necessary vet paperwork prior to travel.

Hope this helps! Just let us know if we can be of assistance with anything else and good luck with everything.

By Bambi on January 7, 2018 at 11:43 am

I’m looking to visit Spain with my 8 months old puppy. He already has a US chip. Advise please, thanks

By on January 8, 2018 at 2:30 pm

Hi Bambi, and thanks for your question. Spain currently accepts ISO Standard 11784 or Annex A to ISO standard 11785 chips in addition to AVID 9 and AVID 10. If you are preparing to go to Spain with a dog, make sure to check all of the import requirements for this country so you don’t encounter any unexpected issues once you arrive.

Also, be aware that Spain has bans on certain breeds—the American Pitbull Terrier, American Staffordshire Terrier, Dogo Argentino, English Bull Terrier, Staffordshire Bull Terrier, Rottweiler, Akita Inu, Fila Brasileiro (Brazilian Mastiff), Tosa Inu. For a more detailed explanation of regulations, you can visit the Ministry of Agriculture website.If you have any additional questions and would like to speak with one of our relocation consultants, please fill out our Arrange a Move form and we will contact you shortly!

Hope this helps!

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