According to the charges, Assis hid a transfer of US$884,000 from the Central Bank, whilst also disguising movement of property worth R$776,000 and depositing US$125,000 in a Swiss account without informing authorities.
The incidents took place between 2003 and 2004, with Assis now freed to decide when he will start his prison term.
Assis himself was a former-professional footballer of some note, but has come to prominence as the advisor for brother Ronaldinho.
He has suffered personal blows in recent times with the closure of his football club in Porto Alegre, as well as his night club in the city following a murder.
