If you encounter one of the aforementioned problems during a check or if your Mobile Ticket is not valid for another reason (for example different journey, no entitlement to the fare reduction, unjustified occupation of 1st Class etc.), the guard will fill in an Irregularity Report (Form C170) in respect of your situation. You have been able to complete your journey but have been requested to go to one of our stations within a certain time-limit.
If you disagree with the Irregularity Report (Form C170) or don't want to pay the sum set out in the Irregularity Report because you have a valid ticket but you were not able to provide proof to the guard that you had purchased a Mobile Ticket, contact SNCB Mobility Customer Service.
Complete the contact form and enter the number of the Irregularity Report (Form C170) under the "File number" section. We require certain data provided by you when purchasing your Mobile Ticket: identity of the person making the purchase/payment (if you haven't purchased your ticket yourself), identity of the main traveller (if you are merely a fellow traveller) whose date of birth has already been asked for. Cite the OPA number and booking number on the confirmation e-mail received following purchase. We will contact you as soon as possible.