General practice, utilities is memang owner sendiri go potong... except u willing pay extra to ur lawyer...
TNB go couter, give account for deposit
Air Selangor some say can do online, some say need go counter.
Even DBKL i have to go office at Maju Junction to do transfer myself.
My lawyer only 'free' me indah water transfer

YOu better do fast else, ur buyer can continue to use ur account (if they are evil) and u gonna bear those charges, since lawyer already release all payments.

Generally no need, the buyer's lawyer should have do it.
If u wan safe, just check with them on the billing owner.