https://paytm.com/bus-tickets/

Code BUS20

Terms and Conditions
Flat ₹200 cashback on bus ticket bookings.
The minimum order value to avail the cashback is ₹1,000.
Offer is valid on minimum purchase of 2 tickets.
The offer is valid only once per day.
The user can avail the offer three times in a month.
The user needs to have a verified mobile number on Paytm.
Cancelled orders will not be eligible for this offer.
Cashback will be credited into the user’s Paytm wallet within 24 hours of the transaction.