A blocked account is typically more serious than a frozen account, and the implication of the term is that it is longer term in nature. Once an account in the U.S. is blocked by government mandate (such as during a time of war or distress), no funds in the account can be accessed without a specific release from the U.S. Treasury.
блокований рахунок; заморожений рахунок; арештований рахунок; арешт на вклад; рахунок з обмеженим (за умовою) правом зняття або переказу коштів
заблокований (заморожений) рахунок