CIUS-PT / Portuguese e-invoicing
Portugal’s national CIUS for structured invoices, used alongside fiscal QR and ATCUD requirements and SAF-T accounting data.
Current version and implementation status
How to recognize the profile
Do not rely on the file extension alone. Inspect the root namespace, customization/profile identifiers, version values and authority-specific envelope.
- ATCUD
- Portuguese QR fields
- CIUS-PT profile
Production validation stack
- 1EN 16931 syntax
Confirm that the document is well formed and structurally compatible with the intended CIUS-PT syntax.
- 2CIUS-PT rules
Apply semantic and business-rule checks rather than accepting a file merely because it parses.
- 3ATCUD/series context
Validate currencies, countries, tax categories, units, payment means and other controlled values against the correct release.
- 4QR field composition
Apply the national, network or authority restrictions that narrow the base syntax.
Common errors and corrective action
Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.
Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.
Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.
Locate the relevant field and rule, correct the source mapping, rerun every validation layer, then preserve the final response.
Countries using or referencing this profile
Questions people ask
What is CIUS-PT?
Portugal’s national CIUS for structured invoices, used alongside fiscal QR and ATCUD requirements and SAF-T accounting data.
How is CIUS-PT validated?
A production check normally applies EN 16931 syntax, CIUS-PT rules, ATCUD/series context, QR field composition. Local browser preflight cannot replace the official validation artefacts or authority outcome.
Which version should I use?
The current research note is: Verify active CIUS-PT and AT technical specifications. Confirm release notes at the official source before production deployment.
Inspect and prepare CIUS-PT files
Technical invoice preflight
Check parseability, core fields, identifiers and arithmetic before submission.
Invoice QR reader
Read QR codes from invoice images in supported browsers.
Invoice code-list checker
Check common currency, country, tax-category and payment-means codes.
Invoice reference and UUID checker
Check the structure and, where implemented, checksum of common fiscal invoice references such as UUID, IRN, CUFE and access keys.