During the due diligence period, buyers have the right to cancel the purchase agreement if they discover something risky about the property. Due diligence is a process.Through this process, the client and its counsel obtain, assess and evaluate available information pertinent to an. A Due Diligence clause allows time for the buyer to obtain background knowledge about the property. When purchasing commercial real estate, you should include a due diligence period as a crucial element in your negotiations and in the contract. Sellers must disclose anything that is known to the Sellers that materially affects the value or desirability of the. Property. Sellers who need help in completing their disclosure obligations should consult with their own qualified,. The cost to County of completing Contractor's performance shall be deducted from any sum due Contractor under this Contract, without prejudice to County's.