Formats · Invoice preflight checker
Identify common XML, JSON and national electronic invoice signatures.
Open toolPrimary formatCIUS-PT, SAF-T(PT), QR / ATCUD
Formats and networksUBL, SAF-T
Official authorityAutoridade Tributária e Aduaneira
Last reviewed2026-08-02
Working tools
Portugal
Explore electronic invoicing formats, identifiers, rules, deadlines and free technical tools for Portugal.
UBLSAF-TPeppolQR
Implementation
CIUS-PT, SAF-T(PT), QR / ATCUD
1
Formats and networksUBL, SAF-T
2
IdentifiersInvoice number
3
What the tool checksInvoice preflight checker · Timeline
4
Official sourcesAutoridade Tributária e Aduaneira
Invoice viewer
Read supplier, buyer, dates, currency, totals and line items.
Open toolInvoice preflight checker
Check parseability, core fields, identifiers and arithmetic before submission.
Open toolArithmetic checker
Reconcile net, tax, gross, paid and payable amounts.
Open toolIdentifier checker
Check the structure of VAT, GST and national business identifiers.
Open toolQR · Invoice viewer
Read QR codes from invoice images in supported browsers.
Open toolInvoice viewer ⇄ Invoice viewer
Compare two files and highlight changed fields and totals.
Open toolPrivacy · Invoice viewer
Replace common names, addresses, tax IDs, emails and bank details locally.
Open toolInvoice viewer · Print view
Create a clean browser print view from structured invoice data.
Open toolInvoice preflight checker ×
Inspect multiple structured invoice files and export a summary.
Open toolInvoice preflight checker · ID
Find exact and likely duplicates using file hashes and invoice keys.
Open toolFormats · XML / JSON
Search field names, values and document paths.
Open toolRequirements
CIUS-PT, SAF-T(PT), QR / ATCUD · UBL, SAF-T
- Invoice number
- Issue date · Due date
- Seller · Seller identifier
- Buyer · Buyer identifier
- Currency
- Net amount · Tax · Amount payable
Implementation
Current statusCIUS-PT, SAF-T(PT), QR / ATCUD
Formats and networksUBL, SAF-T
Delivery modelTax reporting, certified billing software or structured exchange depending on transaction.
Mandate scopeElectronic invoice or transaction-reporting rules with country-specific technical requirements.
Country-specific review points
These checks reflect the documented workflow and technical profile for Portugal. They are reviewed separately from the shared file parser.
- CIUS-PT, SAF-T(PT), QR / ATCUD format or profile signals
- Local tax/business identifier structure
- Core invoice fields and arithmetic consistency