The Cour de Cassation, France's highest court, upheld on Wednesday former President Nicolas Sarkozy's conviction for illegal campaign financing, in his latest legal headache after recently being jailed for nearly a month in another case.

Sarkozy, 70, had appealed against the 2024 conviction for illegal campaign financing over his failed 2012 re-election bid, in which he had been handed a one-year prison sentence.

Six months of that sentence were suspended and could be served through alternative means such as wearing an electronic bracelet without going to jail.