Before registration
Business with no EU establishment?
Separate establishment, the first EU customs operation and the customer’s destination before finding a registering authority.
Find the right starting point
What do you need to do next?
Preparing to register, checking a number and filing a result are different tasks. Choose the guide that matches your stage.
Before a declaration
Check an assigned EU number
Use the issued country prefix and read the register’s result without treating a company name as a reverse lookup.
After a batch report
Keep supplier references with your evidence
Keep the original file beside the downloaded report and compare the submitted input and physical row.
When integrating
Make one server-side Python request
Use the standard library with a timeout, keep the key private and separate failed requests from invalid numbers.
Editorial guidance reviewed 31 October 2026. EORICheck is independent of customs authorities. For registration requirements, follow the authority linked in the relevant guide.
Go to the existing EORI checker →