There may be several causes: 

1. Are you using the correct MOBIB card? 
   If you previously reported your card as lost and found it again afterwards, you must use the new MOBIB card; the old one no longer works. 
2. Is your MOBIB card in a case with other cards or next to your mobile phone? 
   This may result in an error message. It is best to remove the card from the case and scan it without any other cards or your mobile phone nearby. 
3. Are you travelling with a Student Bus Pass? 
   In that case, the subscription is only valid within a limited area. Check whether the stop where you boarded is within the validity area . 
4. Has the subscription been loaded correctly onto your MOBIB card? The subscription is loaded onto your MOBIB card when you scan it for the first time. Due to technical issues, several scanning attempts may be required. Is the problem still occurring? Have it checked whether your subscription was loaded correctly. To do so, visit a Lijnwinkel or contact De LijnInfo at 015 40 88 40.

In the meantime, you can use digital boarding. If you use digital boarding, you can travel validly without a MOBIB card. Is digital boarding not possible for you? Then visit a Lijnwinkel or contact De LijnInfo at 015 40 88 40. 

Activate digital boarding

1. Install the De Lijn app (iOS/Android) and create an account.
2. Go to the Products tab and tap Subscriptions.
3. Link your MOBIB card to your account and activate digital boarding.
4. Always turn on your Bluetooth.