IMT and transport

Tachograph fines for faults, installation or tampering

A roadside report may describe a broken seal, unsuitable equipment or tampering with data. The allegation determines who must answer and which authority handles the case.

What to check in your case

Match the workshop, registration and serial number on the report against the installation record. If a fault occurred en route, the time it was noticed, alternative records and time of repair matter. Decree-Law 84/2026 distinguishes technical offences from rules on use.

Documents for your defence

Full notice or decision, front and back, and evidence of the date of service.

  • Installation, inspection and sealing records
  • Inspection report, printouts and repair receipt

Legislation and official sources

Information checked on 7 November 2026.