The highest court in France has upheld a one-year suspended prison sentence given to a French Polynesian mayor, Cyril Tetuanui, in the appeal court in Paris last year.
Tetuanui was found guilty of corruption and was declared ineligible for public office for a year.
His wife, who is a former government minister, Lana Tetuanui, was at the same time given a six-month suspended prison sentence.
The two had used municipal employees in 2002 to have work done on their private residence on the island of Raiatea.
Tetuanui's lawyer has told local radio that his client will step down without delay to serve his sentence, otherwise the French high commission will intervene.