In Arizona, securing lien rights requires strict adherence to state‐specific regulations. Here's what you need to know in 2025:

• Who Must Serve: All parties, except wage laborers, providing labor, materials, or services.
• Deadline: Within 20 days of first furnishing labor or materials.
• Recipients: Property owner, general contractor, construction lender, and hiring party.
• Late Notices: Accepted but limit lien rights to the 20 days preceding the notice and any subsequent work.
• Amended Notices: Required if the contract price increases by more than 30% from the original estimate.

• Purpose: Served before filing a lien to inform the property owner and other parties of the intent to claim a lien due to non‐payment.
• Timing: Typically served after the 20‐day preliminary notice and before filing the lien.
• Effectiveness: Provides a final opportunity for payment before legal action is taken.

Arizona law mandates that notices be sent via certified or registered mail with proof of delivery. Failure to comply with notice requirements can result in forfeiture of lien rights.

• Send preliminary notices promptly within the 20‐day window.
• Amend notices if contract prices increase by more than 30%.
• Serve NOIs before filing liens to provide notice of intent.
• Maintain records of all communications and deliveries.

By understanding and adhering to Arizona's lien laws, contractors and suppliers can protect their rights and ensure timely payment.