When purchasing commercial real estate, you should include a due diligence period as a crucial element in your negotiations and in the contract. This page contains Due Diligence clauses in business contracts and legal agreements.We have organized these clauses into groups of similarly worded clauses. It involves a comprehensive review of all relevant factors, including title search, encroachments, occupancy, and regulations. Due diligence is the period of time between an accepted offer and closing. Due diligence is a process. Through this process, the client and its counsel obtain, assess and evaluate available information pertinent to an. Due Diligence: What Is it? Introduced in 2011, due diligence money is a fee paid directly to the seller in a real estate transaction. The purchaser must be willing to incur some up-front costs at the risk of discovering a condition that could lead to termination of the transaction.