A conditional waiver is contingent on payment clearing, effective only when the check or wire actually clears. An unconditional waiver acknowledges payment received and releases lien rights absolutely. Standard pattern: conditional waivers at current draw submission; unconditional waivers delivered with the next draw to confirm the prior period was paid.
How the two waivers operate together on a construction draw
Most state mechanic's lien statutes recognize four waiver forms, conditional progress, unconditional progress, conditional final, and unconditional final. The four-form structure handles the timing gap between work being billed and payment actually arriving in the contractor's account.
Standard institutional protocol: with each draw request the GC and major subcontractors deliver conditional progress waivers covering the current draw amount. The lender inspector reviews and the lender funds. With the next month's draw request, the same parties deliver unconditional progress waivers for the prior period's payment, plus new conditional waivers for the current period.
The reason for the split: a contractor cannot rationally release lien rights before being paid (the unconditional waiver) but the lender cannot rationally fund without lien-waiver protection (the conditional waiver). The four-form mechanic resolves the standoff.
Final waivers (conditional and unconditional) attach to the final draw at substantial completion. The unconditional final waiver from the GC and all known subs is the cleanest evidence of lien-free completion and is required before the construction-to-perm conversion or the takeout funds.
Sources
- Quarterly Survey of Commercial/Multifamily Mortgage Bankers Originations · Mortgage Bankers Association · 2026-Q1
- Semiannual Risk Perspective · Office of the Comptroller of the Currency · 2025-12