If you are in Mongolia
As soon as you find out that you have lost your card, please contact Customer Information Center at phone number 18001977 and block your card. You can also come to any branch of TDB with your ID and block your lost card. If you are a TDB online service user, you can block and unblock your card accessing your online account.

If you are abroad
Please call at phone number +(976) 70161988 number and block your card. If you can not make a phone call, please send an email to [email protected].