__________ (Gas agency name),
Date: __/__/____ (Date)
__________ (Name of the Receiver),
Subject: Request for address proof submission
This letter is in reference to the gas connection that you have applied for. The application number is _________ (mention application number). As per the formalities, you are required to deposit your address proof by __/__/____ (date). You may deposit any of the mentioned documents ____________ (mention name of the documents) via __________ (mail/ post/ upload at website/ any other)
Any delay in the submission of the said document may lead to cancellation of your gas connection application.
___________ (mobile number)