They were purportedly hunting down Penelope Fillon’s assentions from when she was utilized as a right hand to her cherished one and after that another MP.
She is said to have been paid €500,000 ($535,000; £425,000).
The middle right applicant and his Welsh-considered life accomplice deny wrongdoing.
The ambush takes after charges in the week after week step by step paper Le Canard Enchaine, which said there was no affirmation that Mrs Fillon had really been doing the occupation as a parliamentary assistant.
Mr Fillon says there is a spread battle against him and has said he is “insulted by the hate and misogyny” in the step by step paper’s story.
On Monday the couple were met independently by authorities for over five hours as a vital part of a preparatory request that may actuate to formal examination.
They were additionally tended to over cash got by Mrs Fillon for work at a dynamic audit, AFP news office proclaimed.
Mr Fillon’s legal advisor, Antonin Levy, revealed to French radio that the hopeful had not had an electorate office while going about as a MP and had rather utilized his home.
“Also, who is at home? Penelope Fillon plainly,” he said.
The pioneer of the parliamentary Republicans Party, Christian Jacob, has said that MPs were unfaltering in their support for Mr Fillon, 62, and were remaining by him.
Mr Fillon, who pursued heavenly war on his notoriety for respectability and beat past president Nicolas Sarkozy and past PM Alain Juppe to his get-together’s assignment, had been driving in feeling considers before the first round of the presidential decision in April.
He has promised to cut 500,000 open part occupations, cut purposes of intrigue and growth working time.
National Front pioneer Marine Le Pen and direct Emmanuel Macron are viewed as his fundamental challengers.