The municipal elections in Poissy, a town in the Yvelines department of France, originally planned for March 15 and 22, were canceled by the administrative court in Versailles. The court ruled that the actions of a candidate might have influenced the outcome of the first-round vote. The current mayor, Sandrine Berno Dos Santos, who belongs to the divers right political group, has said she plans to appeal the decision. The complaint was filed by Mathieu Paranthoën, who led the Mieux vivre Poissy, la gauche et l’écologie avec vous list. His list received 9.56% of the votes cast in the first round, or 1,271 votes, just short of the 10% threshold needed to qualify for the second round. In his protest, Paranthoën accused the Poissy debout! list, which placed sixth with 464 votes, of harming his campaign. The court found in favor of Paranthoën, stating that Poissy debout! falsely claimed support from prominent political figures, a claim denied by those individuals and their movements. The court also noted that Poissy debout! created confusion among voters by suggesting they had the backing of the associations Les Écolos and Yvelines socialistes. However, only Paranthoën's list had received official support from the Socialist Party and the Ecologists. As a result, Maxime Legrand, the leader of Poissy debout!, was declared ineligible to run in any election for one year. Sandrine Berno Dos Santos won the second round of the elections with 52.96% of the votes cast, defeating outgoing mayor Karl Olive, also from the divers right group. Reacting to the court's decision, the mayor expressed her deep regret and announced her intention to appeal to the Council of State, France’s highest administrative court. She called the decision confusing and stated it was based on grievances that did not directly affect her. If the Council of State upholds the decision, new elections will need to be organized.