Sample complain application to the Postmaster about delay in receiving letters.
Post Office (Address)
This is to bring to your kind notice that I have not been receiving my letters and parcels on time. Even the letters from City Name ………… and City Name 2 ………… are being received after seven-eight days. When I spoke to the postman concerned, his reply was not satisfactory.
I shall feel obliged if you will kindly check the reason for this delay and take necessary measures to rectify the mistake.