Is it possible for a merchant to block an amount as a deposit on my card? Permanently deleted user 08 March 2022 12:55 Updated Yes, that's possible, as long your account balance is sufficient. Related articles Why can't I withdraw funds from the ATM? I cannot use the card at unmanned petrol stations or toll roads Where can I top up with cash? What are the dormancy (inactivity) fees? Why can I not log in? Comments 0 comments Article is closed for comments.