Yes, in most cases a lien is not valid unless notice has been sent to the relevant parties ahead of time.
It’s imperative to get preliminary notice out quickly. Oregon has the shortest preliminary notice deadline in the country. On residential projects exceeding $2,000, general contractors must deliver an Information Notice to Owner at the time of signing the contract with the owner, or within 5 days of the date of when the contractor knows that the contract will exceed $2,000. For any other parties (subcontractors and suppliers) on a residential project, the Notice of Right to Lien must be sent within 8 days of first furnishing to the project. On commercial projects, only material suppliers are required to send a preliminary notice (within 8 days of first furnishing), but is advisable for all parties to send it to fully protect their lien rights.
Learn how to send preliminary notice in Oregon.