Arizona's 20-day notice still helps after day 20 โ it just covers less
Arizona doesn't cancel the lien when the preliminary notice is late. It shrinks what the lien can cover. The notice is supposed to go out within 20 days of first furnishing. Send it on day 45 and it still covers what you furnished from 20 days before that notice forward. Everything earlier falls outside the protected window.
That is why "we'll send it once the account looks bad" is a bad habit on Arizona jobs. Every week you wait, older deliveries drop out of coverage. A supplier who waits until month two to notice a problem often discovers the early truckloads are already unprotected.
Filing is a separate clock. The lien deadline runs from project completion, not your last delivery: typically 120 days after completion, or 60 days after a valid notice of completion and its mailing rules apply. Suit then follows within six months of recording. Confirm the completion and mailing facts before you assume the shorter window.
Who must be served, and how the 20-day lookback works, is in LienDeadline's page on Arizona's 20-day preliminary notice rules.
From the LienDeadline team. General information, not legal advice; have a qualified reviewer check the facts on any live job.