Blocking the UBS Maestro card for certain regions Log in to UBS e-banking. In the navigation, select "Cards > Debit cards > Self-service". Your debit cards will be listed. Click "Edit" next the utilization region for the respective UBS Maestro card. Determine whether the card may be used worldwide, throughout Europe or only in Switzerland and Liechtenstein. Temporary settings are possible as well. You can adjust the utilization region in the security settings whenever you wish.