If you use public transportation in the Île-de-France region, you might be eligible for a reimbursement campaign related to service disruptions in early 2026. The campaign began on September 15, 2026, and applications must be submitted by October 13, 2026. The process is entirely online, conducted through the Île-de-France Mobilités compensation platform, which requires an Île-de-France Mobilités Connect account. To qualify, users must have had a Navigo subscription during the disruption period, which ran from March to June 2026. Eligible packages include Navigo Annuel (including Senior), Navigo Mois (Discovery pass and smartphone), 50% Reduction Monthly Package, 75% Solidarity Monthly Package, Imagine R Student, and School. Packages like Navigo Liberté Plus or single tickets are not eligible. Additionally, applicants must have lived, worked, or studied near one of the affected lines and held a Navigo subscription for at least four months during the disruption. The affected lines include Line J, which runs through Ermont, Mantes-la-Jouise via Conflans or Poissy, Gisors, and Line L, which connects Saint-Nom-La-Bretèche to Versailles and Cergy-Le-Haut. Disruptions on these lines occurred between late March and mid-July 2026, primarily due to a defect in the rail system that damaged train wheels. A severe storm in late June caused a full service suspension between Poissy and Les Mureaux from June 28 to July 5, significantly impacting Line J. Reimbursement amounts vary depending on the subscription package and the line typically used. For an Annual Navigo or Monthly Navigo (covering zones 1 to 5), compensation for Line J is equivalent to one month of subscription, which amounts to 90.80 euros, while Line L compensation is half a month, or 45.40 euros. Applicants can only receive one reimbursement during this campaign. Some stations, such as Paris Saint-Lazare, Pont-Cardinet, and La Défense, are not eligible for compensation, as they are served by multiple lines and were not significantly affected by the disruptions.