If you would like to authorize someone to sell your property on your behalf, here is a sample template you can use to write an authorization letter to sell a property.
Subject: Authorization to Sell Property
This letter is to authorize [Name] residing at [Address] to act as a realtor. He/She can present and sell my property at [Address] on my behalf to the potential buyers. This authorization will be valid from [Start Date] to [End Date]. Also, before selling this property, a final call has to be made to me.
Please find attached herewith all the documents related to this property and the terms and conditions of your reference’s selling agreement.
In case you have any doubt regarding this authorization letter, kindly reach me at [Email/contact number]