The verdict concluded that Fillon paid his wife and children and Joe Lauder hundreds of thousands of euros from public pay slips with little or no work.
Fillon was sentenced to five years in prison, three of whom were suspended, and fined 375,000 euros ($423,000) and a 10-year campaign ban.
His wife Penelope was sentenced to three years’ probation and fined 375,000 euros.
Fillons and his co-defendants were also ordered to repay over 1 million euros (1.13 million US dollars) to the French National Assembly.
Fillon served as President Nicolas Sarkozy from 2007 to 2012 as Prime Minister.
He rejected the request at the time, saying that his wife had been an agent for 15 years and held various positions, including managing schedules and representing him in cultural events. He also said that his daughter and son had worked in similar positions for 15 months and 6 months respectively, and he said it was not illegal but “judged wrongly”.