The best way to block your Uttarakhand Gramin ATM card is by calling the toll-free number provided by the bank. Call 1800-3000-0620 or 08106573542 and provide the customer service agent with the necessary information. They will block the ATM card on your behalf. Make sure to call them immediately after you notice that the ATM card is missing. You can also email the bank at info@ugb.org.in or call 0135-2710660/ 661/ 552.