If there is a court order or other valid order from a government agency seizing the account, then no--the bank cannot close it. To do so would be to violate the order. Obviously, you do not need to put any more funds into that account, unless you are yourself subject to some order obligating you to do so; but to either close the account and/or recover the funds in it, you will need a court order of your own (e.g. injunctive relief). Ideally, you should retain an attorney to help you, though if you cannot afford one or the amount of money in the account does not make hiring an attorney economically worthwhile, you can bring a legal action challenging the agency's action yourself, as a pro se litigant. Good luck.