Valid for purchases made in THB only. Offer is limited to 2 redemption(s) per cardholder during the promotion period. Eligible UOB Mastercard card registration and offer activation is required prior to purchase by going to mtr.mastercardservices.com or www.priceless.com/travelrewards, registering card, and activating offer. Cash back will be earned in-store only. Not valid for online purchases. Specific locations where the offer is eligible: Shake Shack Central World, Shake Shack Mega Bangna. The offer is not valid paying with other payment methods such as digital wallets and payment aggregators. If UOB Mastercard does not receive information that identifies your transaction as qualifying for the offer, you will not receive a statement credit. Statement credit may be reversed if qualifying purchase is returned/cancelled.