Paytm

Offer : Get Rs.75 Cashback on First Electricity Bill Payment of Rs.500 or more.
Coupon Code : PAYBILL
https://paytm.com/electricity-bill-payment
Valid till : End of April
Terms and conditions :
Promocode can be used 1 time per user/number.
A number can be recharged only 1 time using this campaign
Cashback is credited within 24 hours of the transaction into user's Paytm Wallet.
Valid for first transaction of electricity bill payments. 
Valid on Web