To redeem the Cash Back Vouchers:

Step 1: Go to the Rewards section.

Step 2: Scroll to the Redeem Vouchers section and click the ‘Redeem’ button under the voucher you want or click on ‘See all’ for the full list of vouchers.

Step 3: The redeemed voucher will appear in your Vouchers section.

Do note that you must have the sufficient Coins available to redeem a Cash Back Voucher.