The microchip: why it matters and what to check
A microchip is a passive electronic transponder about the size of a grain of rice, implanted under the skin at the back of your pet’s neck. It emits a unique identification number when scanned. In the context of international pet travel, it serves one critical purpose: it is the legal link between your pet and their vaccination and health records.
The ISO standard matters. The international standard for pet microchips is ISO 11784/11785, which specifies a 15-digit alphanumeric code transmitted at 134.2 kHz. Many pets microchipped in the U.S. before the mid-2010s have older 9- or 10-digit chips that transmit at 125 kHz. These older chips may not be readable by all international scanners, and some destinations explicitly require the 15-digit standard.
If you are not sure what chip your pet has, ask your vet to scan it and record the full chip number. If the number has fewer than 15 digits, consider having a 15-digit ISO-compliant chip added (the old one can remain in place). USDA APHIS recommends carrying a portable scanner capable of reading 125 kHz chips as a backup.
The order that catches people off guard: chip first, then vaccine
For most international destinations, the rule is unambiguous: the microchip must be implanted before or at the same time as the first rabies vaccination. Not after.
Why does this matter? Because the microchip is the identity. When a vet records a rabies vaccination, they record it against the animal identified by the chip number. If the chip is implanted after the vaccine was given, there is no official link proving the vaccinated animal is the one carrying the chip. Most destination authorities will treat the vaccination as invalid and require starting over from the beginning.
This is the most common, and most frustrating, mistake in international pet relocation preparation. Check the date of your pet’s microchip implantation versus the date of their first rabies vaccine before you start planning international travel.
Rabies vaccine requirements: not just “vaccinated”
Every international destination that accepts dogs and cats requires a valid rabies vaccination. But “valid” has more conditions than many owners realize:
Current (not expired): The vaccine must be in-date on the day you travel, not just on the day the health certificate is issued. Vaccines typically last 1 or 3 years — check the specific vaccine product used.
Dated records: The vaccination record must include: the vet’s name and license number, the vaccine product name, the lot number, the date administered, and the expiry date. A certificate that just says “rabies — vaccinated” may not be sufficient.
After the microchip (for most destinations): As described above — the vaccine record is only as valid as the microchip date that precedes it.
Primary course: Many destinations require a complete primary vaccination course — some require just one vaccine (for countries like Canada and the EU, one valid vaccine is usually sufficient once the primary series is established). Japan requires two primary vaccines given at least 30 days apart, after microchipping.
The titer test: the step that takes the longest
A rabies titer test measures the level of rabies antibody in your pet’s blood. A passing result (≥0.5 IU/mL on the FAVN test, the gold standard) confirms that the vaccine produced an adequate immune response.
Which countries require it from the U.S.: Japan, Australia, New Zealand, Singapore, Taiwan, and Hawaii (which operates under state quarantine rules). The EU, UK, Canada, and most other destinations do NOT require a titer test for pets traveling from the U.S., because the U.S. is on their approved-country lists.
Why the wait period is the critical bottleneck: After a passing titer test is recorded, most countries impose a mandatory wait period — typically 180 days (Japan, Taiwan) or 90 days (Singapore), during which the animal cannot enter the country. This wait begins from the date the blood is drawn, not the date the result comes back.
That means: even if you start immediately, you cannot enter Japan with a new pet in under 6 months — and realistically it takes 9–12 months to complete the full process.
Approved laboratories: The FAVN test must be conducted at a laboratory approved by the destination country. Not all USDA labs qualify. Japan, Australia, and other countries publish lists of approved labs — confirm the lab is approved before submitting the blood sample.
A simplified timeline for destinations that require a titer test
Working backwards from your travel date:
- Travel date — must have all documents, quarantine pre-booked if needed
- 180 days before travel — titer test blood must be drawn (passing result) at an approved lab
- ~30 days before titer test — second (or final) rabies vaccine must have been given
- ~30 days before second vaccine — first rabies vaccine (after microchip)
- One or more days before first rabies vaccine — microchip implanted
- Well before the chip — apply for any required import permit from the destination country
Total: at minimum 8–9 months before travel, assuming every step works on the first attempt.
Use the pet travel readiness checklist tool to turn these requirements into specific target dates for your destination and travel date.
As of this guide’s writing. Always confirm current requirements with the official authority of your destination country before you begin.