Paytm is Offering Flat Rs 20 Cashback On Metro Card Recharge. This Code can be used two times per user, per card. This is Valid only on first & second transaction of Delhi Metro or Mumbai Metro. User will get Flat Rs 10 Cashback on 1st & 2nd Metro recharge of Rs 100 or more. Cashback is credited within 24 hours of the transaction to user's Paytm Wallet. Get Metro Card Recharge Online Only at Paytm. Online metro card recharge can be easily done with Paytm.com by Saving time. Here You get the comfort of choosing from various payment options like Bank Debit/Credit, Net Banking or Paytm Wallet.