In the case of loss or theft of your card, you need to block it immediately. To do so you must telephone customer service of Maastricht Bereikbaar (043 - 799 94 09). Customer service will then check whether in your circumstances you can apply for a new OV-chipkaart.
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.