R.I. Gen. Laws § 34-42-3: Owner’s lien.

(a) The owner of a self-service storage facility and his or her heirs, executors, administrators, successors, and assigns shall have a lien on all personal property located at a self-service storage facility for rent, labor, insurance, or other valid charges, present or future, in relation to the personal property stored, and for expenses necessary for the preservation of the personal property or reasonably incurred in its sale pursuant to law. The lien attaches as of the date the personal property is stored in the self-service storage facility, and the rental agreement shall contain a conspicuous statement notifying the occupant of the existence of the lien.

(b) The owner loses its lien on any personal property that it voluntarily delivers or that it unjustifiably refuses to deliver.