Pay-if-paid and lien waivers: both void
West-Fair ties the pay-if-paid question to lien rights: because a true condition-precedent payment clause would waive your right to lien, and §34 voids any agreement waiving lien rights, the clause cannot survive. The same section kills advance lien waivers outright. Your lien window is generous by US standards — file within 8 months of last furnishing (4 months on a single-family dwelling, Lien Law §10) — which makes New York one of the few states where the statute, not the calendar, is your main protection.
