Support & Contact – De Lijn General questions Summer campaign How do I know how many vouchers I can still use? Published on July 03, 2020 07:02 On each voucher you receive by text, you will see the remaining number of vouchers that you can still exchange for a day pass or Blue-bike ride at the end of the message. Any questions about this subject?Fill in this form. Related articles Am I eligible to receive free vouchers? Can I transfer my day pass to someone else? What should I do if I lose something? What if I’ve used up my vouchers? Can I transfer my vouchers?