India Post — Delivery or letters are not been made properly

Address: Mumbai City, Maharashtra, 400068

Website: www.indiapost.gov.in

Our area postman doesn't drop the receipt related to letter if my house door is locked, i even have letter box installed right next to my door my name and instruction is written on it in english as well as in marathi. Because of not receiving letter on time i have been charged extra by the bank, and this has happened thrice.
So, please this is my humble request that don't trouble common man so that it won't affect you or any of your family members in other way, please do think about this.