I have filed money recovery suit against my ex-landlord for refund of deposit amount. However, he has moved his residential address and his new address is not known to me. Registered A/D letter sent by m advocate has returned with the note as "Shifted'.He has been avoiding Court summons,as the Court server is not able to locate him. What remedy I have according to the law ? is is'nt sufficient to serve him the notice at his last known address?