You can travel using your trial season ticket as from the date indicated in the confirmation letter you will receive from Maastricht Bereikbaar. This will be the start date you requested. The date is definitive and from this date you commute between home and work using your OV-chipkaart for a period of one month entirely free of charge and without any other obligations. You should follow the instructions contained in the letter you will receive from De Lijn.
If you have any more questions, you can contact our customer service on weekdays between 08.00 and 20.00 hours on phonenumber 043 - 799 94 09. Or by using the contactform.