When you have lost your card and apply for a new one (with lost/stolen card option), your lost smartcard is automatically set to passive mode so that no one can not use it. If you find your lost card before your new card is printed, you can apply for a Computer Center (B-14 Office). After your card is controlled and seen as working, then it can be set to active mode again if only your new card application is not in print process.

In order to activate your card, you need to cancel your new card application from CardInfo webpage (https://cardinfo.metu.edu.tr/) first. You can only do this operation if your card application has not been confirmed by Registrar's Office (if your new card application is confirmed by Registrar's Office, it means your card is in print process).