Can I redeem promotional codes in the BLS Mobile App? Michael Rieder November 15, 2021 13:42 Updated You can add the voucher directly at the time of payment. Enter the voucher code before you select [Buy now]. Related articles What do I have to do during a ticket inspection? When will I receive each receipt? Which payment methods can I use for purchasing tickets with the BLS Mobil app? Is check-in/check-out valid for mountain transport? My payment method was not accepted. What can I do?