Does the bnak have a responsibility to let a debtor know his account is frozen seems to me if that customer has been banking with the bank for a very long time someone would let that person know and again I do not understand how a creditor gets your banking information I thought banks would be wary about giving out information Like I said before my account was frozen by mistake and any information that will help others understand how a creditor gets your information and seems to know when to "attach it" meaning when the funds are there would be appreciated. I think a lot of people like myself know a Judgement has to take place but how they get your banking information is still a mystery

No they are not required to notify you, since you should be aware of such action taking place. The company that is owed had to get a judgement, and then go to court and get an attachment/garnishment.

So once served the bank has to obey the court order.

It is easy, almost any bank in the US if and when you open an account you have a credit history done, so they look at who has ran credit reports on you and see what banks you are doing businesss with or have looked at.
And I am sure there are other tricks I don't know that that is one easy one

Does the bnak have a responsibility to let a debtor know his account is frozen seems to me if that customer has been banking with the bank for a very long time someone would let that person know and again I do not understand how a creditor gets your banking information I thought banks would be wary about giving out information Like I said before my account was frozen by mistake and any information that will help others understand how a creditor gets your information and seems to know when to "attach it" meaning when the funds are there would be appreciated. I think a lot of people like myself know a Judgement has to take place but how they get your banking information is still a mystery
When a creditor files their suit, they can sometimes file a "verified motion for proceedings supplemental" which is basically a subpoena that is sent to banks the creditor suspects you may bank with that instructs the bank to verify whether you have an active account, the account number and the amount on deposit. It is signed by a Judge and the bank has no choice but to follow the court order.