Oregon Revised Statutes Mortgages and Liens § 87.617

(1) A true statement of demand, after deducting all credits and offsets;

(2) The name of the individual who received ambulance services;

(3) An itemized statement of the ambulance services provided;

(4) A statement that the amount claimed is a true and bona fide existing debt as of the date of the filing of the notice of lien; and

(5) The date on which payment for the ambulance services is due.