it’s a Time Deposit Account. Then they’ll use it as a collateral for your credit card. Usually the card limit will be only 80-90% of whatever amount you put in that TD. You can’t access this fund until you cancel your credit card. This is a way to get a credit card when you don’t have a credit history in a country. Some would say it’s less hassle to use a debit card but credit cards do have its benefits.