Yes, with most car rental agencies, a credit card is required for the deposit, as the agency typically blocks a certain amount on the card to cover potential damages to the vehicle, as well as any additional costs that may arise during the rental period, such as traffic fines, extra fuel, or an extended rental period.
A credit card is often preferred because it allows agencies to easily perform holds and subsequent transactions in case they need to charge for damages or unpaid costs. Additionally, the hold on the card does not mean the money will be charged immediately; it is simply "reserved" on the account, and when the renter returns the vehicle in good condition, the hold is removed. On the other hand, if damage to the vehicle occurs or any unforeseen costs arise, the agency may charge the corresponding amount to the card.
It is important to note that many agencies do not accept debit cards for this type of deposit, as they do not provide the same level of security as credit cards. Also, the amount of the hold may vary depending on the type of vehicle you rent and the agency's policy, and it can sometimes be quite high. Therefore, it is recommended to inquire in advance about the amounts that will be blocked.