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Yes, for the routine kind. Faxed lien waivers are standard practice for progress payments on construction jobs, and most general contractors accept them without blinking. The exceptions matter, though: final waivers, waivers that will be recorded with a county, and anything your contract specifically says must be an original usually need wet-ink originals, not a fax.
This is general information, not legal advice.
A lien waiver is a signed document in which a contractor, subcontractor, or supplier gives up the right to file a mechanics lien against the property for the work or materials it covers. On a typical job, the exchange is simple: you sign the waiver, the general contractor releases your payment. It protects the owner and GC from paying twice (once to the GC, once to a lien claimant), and it protects you by keeping payments moving.
The part people underestimate is how much weight these documents carry. A signed waiver is binding. Signing an unconditional waiver before the check actually clears means you have given up your lien rights for that amount whether or not the money arrives. That is why reading the waiver type before you sign matters more than how you send it.
| Waiver type | What it waives | Fax acceptable? |
|---|---|---|
| Conditional progress waiver | Lien rights for this billing period, only if payment clears | Almost always; this is the routine faxed waiver |
| Unconditional progress waiver | Lien rights for this billing period, regardless of payment | Usually accepted by fax, but read it twice before signing |
| Conditional final waiver | All remaining lien rights, only if final payment clears | Often accepted by fax, though some GCs want the original |
| Unconditional final waiver | All remaining lien rights, period | Frequently requires a wet-ink original; ask before faxing |
For progress payments, a faxed waiver is the industry norm. The GC's accounting office needs something in the file to release the draw, and a faxed signed waiver with a confirmation page satisfies that. Several states even have statutory waiver forms (California and Texas are the well-known examples), and nothing in those statutes demands a particular transmission method: what matters is the signed form itself.
Originals become important at the edges. If the waiver will be recorded with the county, the recorder's office may require an original with a wet signature or a notarization. Some GCs and owners insist on originals for final waivers as a matter of policy, because the final waiver closes out the job and they want the cleanest possible paper trail. And your subcontract agreement may specify originals in writing: if it does, that controls, no matter what the industry norm is.
Read the waiver's label before you sign: conditional vs unconditional, progress vs final. Those four combinations mean very different things, and people sign the wrong one under deadline pressure all the time. Confirm the payment amount and the "through date" on the waiver match the invoice you are being paid on; a waiver that covers more work than the check pays for is a classic way to lose lien rights you never meant to give up.
On the sending side: use a cover sheet identifying the project name, your company, and the invoice or pay application the waiver covers. Keep the fax confirmation page with your copy of the signed waiver, and follow up to confirm the GC's office received it before you assume the payment is released. If you are on the receiving end, the same confirmation page is what your file needs to show the waiver arrived.
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