The notice shall contain the name and address of the subcontractor or material supplier , the date the subcontractor or material supplier started to work or to deliver materials, the type of work done and to be done or the type of labor, services, materials, fixtures, apparatus or machinery, or forms or form work delivered and to be delivered, and the name of the contractor requesting the work. The notice shall also contain the following warning:
"NOTICE TO OWNER
The subcontractor providing this notice has performed work for or delivered material to your home improvement contractor. These services or materials are being used in the improvements to your residence and entitle the subcontractor to file a lien against your residence if the labor, services, materials, fixtures, apparatus or machinery, or forms or form work are not paid for by your home improvement contractor. A lien waiver will be provided to your contractor when the subcontractor is paid, and you are urged to request this waiver from your contractor when paying for your home improvements."
Such warning shall be in at least 10 point bold face type. For purposes of this Section, notice by certified mail is considered served at the time of its mailing.
770 ILCS 60/21