Subcontractors, material suppliers, equipment renters, etc., who have not contracted directly with the owner of the property being improved, must give the property owner, general contractor, construction lender, if any, a Preliminary Notice within 20 days after the claimant has first furnished labor, services, equipment, or materials to the jobsite. The notice has to identify the property being improved, describe the work being performed, give an estimated value of the services, or materials being provided, and include certain statutory language about the lien law.