Prepare and mail due diligence letters to those property owners identified as inactive. Gov with the year reported, owner name, and dollar amount.The objective of due diligence is to return unclaimed property that has remained dormant on a holder's books to the rightful owner. Due diligence in real estate refers to the process of investigating and evaluating a property before finalizing a real estate transaction. A homebuyer should perform "due diligence" to learn everything they can about the home they are considering buying before it's too late. Examples of the due diligence letters can be found in the Manual for Reporting Unclaimed Property in the Forms section of the website.