Did you write the receiver's phone number (if his phone number hasn't been changed after moving to the new place) on the parcel? If so, there is the possobility that the parcel may be sent to the receiver's new address. The other ways are that you can ask the receiver to entrust somebody in his old address to collect the parcel for him, or you may ask the recevier to go to the poat office at his old area regularly to check and collet the parcel himself.