6 Pa. Stat. § 11
Hereafter where any person, corporation, firm, or copartnership may have what is known as a "common law lien" for work done or material furnished about the repair of any personal property belonging to another person, corporation, firm, or copartnership, it shall be lawful for such person, corporation, firm, or copartnership having said common law lien, while such property is in the hands of the said person, corporation, firm, or copartnership contributing such work and material, to give notice in writing to the owner of the amount of indebtedness for which said common law lien is claimed for the labor and material that has entered into the repair, alteration, improvement, or otherwise, done upon the said property. If the said claim for said work or material is not paid within thirty days the said person, corporation, firm, or copartnership to which said money is due, may proceed to sell the said property, as hereinafter provided: Provided, however, That the owner of said property, if he disputes said bill, may issue a writ of replevin, as provided by law, within the said thirty days, and the said dispute shall be settled in said action of replevin.
6 P.S. § 11