Here is what a my manual from the 2012 WBA Deposit Complaince School says
"Bank may impose fees by contract on account holders in connection with garnishments, provided such fees are disclosed in the deposit account schedule of fees and charges delivered to the account holder.
However, such fees may not be taken from any amount that must be frozen and any "protected amount" under the Garnishment of Account Containing Federal Benifit Payment interim rule. Also, such fees may not be imposed agter the date of account review."
The manual did not give a citation to the above statement.
So my interpitation is NO you can not take your fee. I am not a lawyer just a small town complaince officer with a manual
Good Luck