Sarkozy is accused of "abuse of someone in an impaired state" over allegations he took donations for his 2007 presidential run from L'Oreal cosmetics fortune heiress Liliane Bettencourt, who is in her 90s.
After today's request by the Bordeaux prosecutor's office, a judge still needs to decide if the case will be dropped.
A web of politicians, financial advisers and lawyers has been drawn into the investigation into whether there was a conspiracy to defraud France's richest woman. Bettencourt's ex-accountant told police she gave USD 192,000 to be passed on to Sarkozy's campaign treasurer.