Neb. Rev. Stat. § 52-1901

For purposes of sections 52-1901 to 52-1907 , nonconsensual common-law lien means a document that purports to assert a lien against real or personal property of any person or entity and: (1) Is not expressly provided for by a specific state or federal statute; (2) Does not depend on the consent of the owner of the real or personal property affected; and (3) Is not an equitable or constructive lien imposed by a state or federal court of competent jurisdiction.