Lien Waiver
A signed release of lien rights, usually exchanged for payment.
What it means
A lien waiver is a document a contractor, subcontractor, or supplier signs giving up mechanics-lien rights, usually in exchange for a payment. Four common types come from two choices: conditional vs. unconditional (does the waiver take effect only once payment actually clears?) and progress vs. final (does it cover one payment period or the whole job?). Some states mandate specific statutory waiver forms.
Why it matters before you sign
Signing an unconditional waiver before the check clears can release rights for money you never receive — always check which of the four types is in front of you.
In a contract, it looks like this
In exchange for the March progress payment, the subcontractor signed a conditional waiver covering work performed through March 31.
This definition is a general, educational explanation — not legal advice. XOsign provides AI-assisted document tools and does not provide legal advice; consider consulting a qualified attorney for guidance on your specific situation. Requirements vary by state.
See any term explained in your own document.
Upload an agreement and XOsign walks you through every clause in plain language — before you sign, not after.