What does BR-02 mean?

Why error BR-02 appears in an e-invoice and how to provide a correct, unique invoice number.

BR-02 — Missing invoice number

What it means

The invoice number is missing — every invoice needs a unique number. This field identifies the specific invoice among everything the seller has issued, and without it the invoice can't be unambiguously referenced later (for example, in a credit note).

How to fix it

Check that the invoice XML contains an ID element with the invoice number, and that this number is actually unique in your numbering system. If numbering is assigned automatically by accounting software, check whether the number gets dropped or replaced with an empty value during export.

Example

Wrong: <cbc:ID></cbc:ID> (empty) or the element is missing entirely. Correct: <cbc:ID>2026-0142</cbc:ID>.