# Portugal's digital itinerary slip: what the AT accepts

> Paper is gone. How to keep digital itinerary slips that survive an AT audit.

**Author:** Inês Pereira — Portuguese Tax Specialist (AT)  
**Published:** 2026-04-12  
**Updated:** 2026-04-28  
**URL:** https://quilometragem.com/blog/portugals-digital-itinerary-slip-what-the-at-accepts

**TL;DR:** How to keep digital itinerary slips that survive an AT audit.

- How to keep digital itinerary slips that survive an AT audit.
- Summary Portugal's AT accepts digital itinerary slips with worker and vehicle identification, trip data, SHA-256 hash and 10-year retention.
- Watch out for untraceable edits and indiscriminate auto-approval.

## Summary

Portugal's AT accepts digital itinerary slips with worker and vehicle identification, trip data, SHA-256 hash and 10-year retention.[^rgpd-73] Watch out for untraceable edits and indiscriminate auto-approval.

## Sources

- [Regulamento Geral sobre a Protecção de Dados (UE) 2016/679](https://eur-lex.europa.eu/eli/reg/2016/679/oj) — Jornal Oficial da União Europeia (2026-04-28)