Paytm is Offering 100% Cash back Every Hour on Delhi Metro Card Recharge. Every hour, one lucky customer will get 100% Cashback. This code can be used 3 times per user per number. This Code is valid only on Delhi Metro Card Recharge. Cash back will be credited within 24 hours of the transaction into the user's Paytm account. Recharge now and get Recharge a smart card is a special type of ticket used for multiple journeys. Valid for all Users.NOTE:If you are a lucky User, you will get cashback as per below slabs:(a) If you transact for Rs 300, you will receive 100% cashback ie. Rs 300.(b) If you transact for Rs 1000, you will receive 100% cashback ie. Rs 1000.