This document provides an overview of internet resources that can be used for due diligence in real property transactions and litigation. It begins by explaining basic internet tools like search engines, meta-search engines, and databases. It then discusses strategies for using search engines effectively and performing due diligence on a property. Sections provide guidance on finding property listings, sales prices, ownership information, taxes, certificates of occupancy, neighborhood data, and more. The document is intended as a guide for property lawyers, investors, and managers to leverage internet resources in their work.