Is it possible to get renters insurance backdated to the 1st of the month for landlord purposes only? 
This is when you need an agent to help you . If you have been shopping carriers for the lowest price and have been jumping around to different carriers over the years , there is no loyalty or trust built up with your current company and underwriter . This is a big exception for an underwriter to make so they take a great deal of factors into consideration when making their decision . Typically insurance companies and their underwriters are not keen on backdating policies . You would have to get with your agent to discuss if they are willing to go to the underwriter to ask for the exception to the rule . If they weer to allow it you would have to sign a certification that there were no losses in the time frame between coverage beginning and the date you actually purchased the policy . 