Oregon Revised Statutes Cities § 223.550

The treasurer shall immediately, after having sold any real property upon the list described in ORS 223.515, make and deliver to the purchaser a certificate of sale of the property so sold, setting forth therein the object for which the sale was made, a description of the property sold, a statement of the amount it sold for, the lien or final assessment for which the property was sold, the name of the purchaser and that the sale is made subject to redemption within one year from the date of the certificate, and then deliver such certificate to the purchaser.