00105: Signature time after receipt
What it means
SdI code 00105 means the time reference of the signature is later than the moment SdI received the file.
The usual cause
Check whether the clock of the computer or service that signed the file was set ahead.
How to fix it
Correct the clock of the signing device if needed, sign the file again and send it under a new name.
The code as published
Read the official document . Source: Elenco dei controlli effettuati sul file fattura del Sistema di Interscambio, version 2.0, published by Agenzia delle Entrate, fatturapa.gov.it, read on 8 November 2026.
Klarbon explains each code in its own words; the official wording is in the document linked above.