Error Guide

🇵🇹 PT-R-004: ATCUD validation code required in Portugal

ErrorB2G MandatoryManual Fix

Portuguese invoices require ATCUD (unique document code).

Quick Facts

Severity

Error (rejection)

Ruleset

ubl-2.1

Mandate

B2G Only

Fix Type

Manual

Why This Matters in Portugal

Portugal requires (B2G) e-invoicing using CIUS-PT (UBL 2.1), CIUS-PT (CEFACT CII), Peppol BIS 3.0. Invoices with this error will be rejected. They cannot be processed for Portugal compliance.

How to Fix PT-R-004

1
Get ATCUD series
Register series with AT
2
Generate code
Series + document number
3
Add to invoice
Include ATCUD in document

Portugal E-Invoicing Requirements

Phase

Status

Scope

SAF-T reporting

Live (Jan 2013)

All taxpayers (monthly)

B2G

Live (Jan 2025)

All suppliers to public entities

ATCUD + QR codes

Live (Jan 2023)

All invoices

QES for PDFs

Jan 2027

All PDF invoices

Common Causes

•Missing ATCUD
•Invalid ATCUD format
•Uncertified software

Fix PT-R-004 automatically

Upload your invoice and let Invoice Navigator auto-remediate this error.

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