BR-CL-04
A rule of the European standard EN 16931 – applies to every invoice following the standard, including Peppol BIS Billing 3.0.
What this error means
BR-CL-04
The currency code is not a valid ISO 4217 code — e.g. a typo or lowercase letters.
How to fix it
Use exactly three capital letters from ISO 4217: EUR, PLN, SEK, NOK…