Michigan starts with the recorded Notice of Commencement
A subcontractor or supplier generally serves the named designee and general contractor within 20 days after first furnishing. The statutory form references the recorded Notice of Commencement, so the recording reference belongs in the prepared document.
Ohio uses the parties named in the Notice of Commencement
A qualifying subcontractor or material supplier generally serves the owner or designee and the original contractor within 21 days after first labor or materials. Late service can preserve only a limited period and later work.
Pennsylvania uses an online directory
For a searchable project with a filed and posted Notice of Commencement, a subcontractor files the Notice of Furnishing in the State Construction Notices Directory within 45 days after first work or materials. Certified mail does not replace that filing.
South Carolina focuses on the amount or value furnished
Written notice to the owner can attach lien protection against the unpaid contract balance. A lower-tier supplier may have an additional certified-mail notice to the contractor under a separate subsection.