A sample complaint letter to the Post-Master, complaining about Non Receipt of the Parcel by your sister, sent by you two months ago.
Post Office, Address
Sub: Non receipt of parcel
I sent a Registered Parcel to my sister, Name, at:Street Address, City Name, State Name on date………………, vide your receipt no. ………………… So far, the parcel has not been received by her. Its been over two months since the non receipt of the parcel. It appears, either the parcel is delivered to somebody else or it is lost in transit.
You are requested to enquire into the matter and apprise us of the factual position without any further delay.
Enclosure : Photocopy of receipt