Missouri Lien Waiver Guide
Missouri requires statutory lien waiver forms. Non-compliant waivers may be void and unenforceable.
Key Information
Waiver Type
Statutory
Filing Deadline
6 months from last furnishing labor or materials
Notice Requirements
Subcontractors must file a Notice of Rights (Preliminary Notice) within specific timeframes.
Key Statutes
Mo. Rev. Stat. §429.005 et seq.; §429.380 (waiver forms)
Waiver Types in Missouri
Conditional Waiver on Progress PaymentRequired
Waives lien rights for a specific progress payment, but only upon actual receipt of payment. Protects the claimant if the check bounces or payment fails.
Unconditional Waiver on Progress PaymentRequired
Immediately and unconditionally waives lien rights for a specific progress payment amount, regardless of whether payment has actually been received.
Conditional Waiver on Final PaymentRequired
Waives all lien rights upon receipt of the final payment. The waiver is conditioned on actual receipt of the specified final payment amount.
Unconditional Waiver on Final PaymentRequired
Immediately and unconditionally waives all lien rights. This is the most comprehensive waiver and should only be signed after final payment is confirmed in your account.
Missouri Lien Waiver Rules
Missouri enacted statutory waiver forms effective August 28, 2018. Four statutory forms are required: conditional/unconditional for progress and final payments. Use of non-statutory forms may render the waiver ineffective. Missouri is strict about waiver form compliance.
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