The Condition column — in the "Downloaded files" section, in the Drivers and Vehicles tabs — shows the result of the signature verification for each tachograph file.
When a tachograph downloads a DDD file from a vehicle or driver card, the file contains cryptographic signatures that prove the data hasn't been tampered with.
After a file is downloaded, our system verifies these signatures.
The Condition column includes all download attempts — even the failed ones.
It helps you:
Understand why a file is available, has issues, or is missing
Spot failed download attempts and investigate them
Identify possible hardware or connection problems
Download invalid files to show them to a repair center
Condition statuses
Based on this check, each entry gets one of these statuses:
Status | Color | Meaning |
Valid | Green | The file is fully verified and saved. It’s available for download and use.
|
Warning | Yellow | The file is usable, but has minor verification issues (for example, an empty or missing technical signature).
|
Invalid | Red | The signatures are broken, for example because of corrupted data or certificate issues. The file is not compliant.
|
From the platform, to quickly see what each status means, hover over the information icon 
next to the Condition column title.
Filtering by condition
You can also filter your files by their condition status to focus only on valid, warning, or invalid entries.
🔔 When filtering by a specific vehicle or driver, invalid entries (red) are not shown, because they don’t have that data, only the error was recorded.