What is a mechanic's lien release?

Lien waivers are the homeowner's single most important defensive document against double-payment risk (you pay your GC in full but a sub files a lien because your GC didn't pay them).

The four waiver types (California forms, analogous in most states):

1. Conditional Waiver and Release on Progress Payment (Civil Code §8132) — waives lien rights for work through a specific date IF the contractor actually receives the stated payment. Use BEFORE you release the draw.

1. Unconditional Waiver and Release on Progress Payment (§8134) — waives lien rights for work through a specific date; contractor certifies payment received. Use AFTER payment received. Strongest protection.

1. Conditional Waiver and Release on Final Payment (§8136) — waives all future lien rights IF final payment is made.

1. Unconditional Waiver and Release on Final Payment (§8138) — waives all lien rights; contractor certifies final payment received.

When to collect from whom:

• From the GC — at each draw release, collect a conditional partial in advance; collect an unconditional partial after payment clears.
• From subcontractors — especially any sub who sent a preliminary notice. Unconditional partial after each draw.
• From material suppliers — those who sent preliminary notices.
• At final payment — unconditional final from GC and every sub.

What a valid waiver must contain:

• Claimant's name.
• Owner's name.
• Contractor's name (if claimant is a sub or supplier).
• Property description.
• Amount of payment.
• Date of payment.
• Specific language releasing lien rights through the stated date.
• Signature and date.

Common mistakes to avoid:

• Accepting a waiver for the wrong dollar amount.
• Accepting a waiver with a different date than the payment.
• Accepting an unconditional waiver before the check clears.
• Not collecting from subs who sent preliminary notices.
• Using a waiver from a different state.

What happens if you don't collect waivers:

• Sub who worked on your project, wasn't paid by GC, and sent a preliminary notice can file a mechanic's lien even if you paid your GC in full.
• Lien attaches to the property; blocks clean sale or refinance.
• You either pay again, bond around the lien, or litigate.

Practical homeowner workflow:

1. Save every preliminary notice.
2. Before each draw, require GC to provide a list of subs/suppliers for that period.
3. Require unconditional partial waiver from each of them after payment.
4. Don't release next draw until waivers are in hand.
5. At final payment, collect unconditional finals.

AskBaily's matched contractors build waiver collection into their draw request procedure. See /ask/what-is-a-mechanics-lien for the lien fundamentals.