It's pretty simple!

Mobile App: On the payment page click on 'Enter Offer Code' under 'Unlock Offers or Apply Promo codesand enter the WinPin code and click on 'Apply'

Please refer the below screenshot for reference

Only one WinPin voucher can be redeemed in a single transaction at a time.


NOTE: For the Winpin codes received from bank, we suggest you to check the T&C of it because the voucher codes are locked to the card against which it was offered. The remaining payment has to be done with the same card and you are though.