[New] Amazon Refer & Earn Program – Rs.100 Gift card on First Purchase + Refer & Earn Rs.200
Points to remember to get cashback:-
Refer must click on Referral link and successfully complete the Amazon.in signup process on the same calendar day
The referred customer who registered the new account must be new (and not a returning or existing) Amazon.in customer. We will determine in our sole discretion whether the customer is new to Amazon.in
The referred customer must place an order worth Rs.300 (excluding shipping, handling and gift-wrapping fees) or more on the Amazon.in website. Purchases of Kindle ebooks and Amazon.in Gift Cards are not eligible; and
The referred customer must not cancel the order prior to shipment and the order must not be returned or refunded.

Sign up using Referral Link (Ask for refreal link in pm only)
Place order Rs. 300 or more excluding shipping (Not valid on ebooks, Amazon.in Gift Cards)
.Rs.100 Amazon Gift Cards will be automatically applied to your Amazon.in account approximately 30 days after an order for Rs.300

Source https://www.amazon.in/refer-and-earn/ref=footer_refer_earn