Difference of shutting down and preventing access to funds. It is legal, based on small print, to shut down an account on the sending of a letter (proof of sen

Difference of shutting down and preventing access to funds. It is legal, based on small print, to shut down an account on the sending of a letter (proof of sending a letter) and place funds for all accounts (businesses likely to have multiple accounts, globally) in a nostro account for transfer, waiting for payment instruction, just-like-that. Quite ugly, but done. That's a bit different from OP's case, however.