A notice of furnishing is a document that subcontractors, material suppliers, equipment lessors, and other parties without a direct contract with the property owner send early in a construction project to preserve their right to file a mechanics lien if they aren’t paid. Depending on the state, the same document is called a preliminary notice, notice to owner, or pre-lien notice. The purpose is identical everywhere: it tells the property owner, and sometimes the general contractor, that a specific party is contributing labor or materials to the job and expects to be paid. Sending it on time is one of the most overlooked steps in construction, and skipping it can permanently destroy your ability to recover unpaid balances through a lien.
Who Has to Send One
The general rule is that anyone without a direct contract with the property owner should send a preliminary notice. Subcontractors, sub-subcontractors, material suppliers, and equipment rental companies are the primary filers. If a general contractor hired you, or another subcontractor hired you, this requirement was designed for your situation.
General contractors who signed directly with the owner are typically exempt. The owner already knows who they hired and what the contract covers, so the notice would be redundant. Laborers are exempt in some states and not in others; where they aren’t, notice is still required to protect claims for wages, benefits, and withholdings. Because a notice that turns out to be unnecessary costs almost nothing, while a missing notice can cost you the entire unpaid balance, the safe move is to send one whenever you’re uncertain.
Roughly half of all states require some form of preliminary notice to preserve lien rights. The specifics vary: some require notice from all claimants, others only from certain tiers, and a few only above a dollar threshold or for specific property types. Even where notice isn’t mandatory, sending one puts the owner on record and creates a paper trail that strengthens any future claim.
Why the Notice Exists
Construction projects run in tiers. The owner hires a general contractor, who hires subcontractors, who hire their own suppliers and sub-subcontractors. The owner at the top may have no idea who’s actually working three levels down. Without notice, the owner can pay the general contractor in full, and the general contractor can then pocket the money or go bankrupt, leaving lower-tier parties with no recourse against the property itself.
The notice closes that gap. Once the owner receives it, they know which parties are contributing to the project and expecting payment. That gives the owner leverage to withhold funds from the general contractor until lower-tier payments are confirmed, and it gives the sender a documented foundation for a mechanics lien later. The notice itself doesn’t create a lien. It preserves the right to file one.
Deadlines You Have to Meet
Timing is the most rigid part of the process, and it’s where most claims fall apart. Deadlines range from before work begins to as late as 120 days after labor or materials were last furnished, depending on the state. The most common window is 20 to 30 days from the date you first provide labor or materials to the site. Some states count differently: from first delivery, from the date your contract was signed, or from when the owner’s notice of commencement was recorded.
The clock starts on day one of your involvement, not the day you realize you might not get paid. This catches first-time filers off guard. If your first delivery hits the site on March 1, your deadline could arrive by late March even though your invoice isn’t due for 60 days and you have no reason yet to worry about payment. The notice is preventive, not reactive.
State deadlines cluster in a few ranges:
- Before work begins. A small number of states require notice before any labor or materials are furnished.
- 20 days. One of the most common windows, used in several major construction states, counted from the date you first furnish labor or materials.
- 30 to 45 days. Another common tier, giving slightly more breathing room but still requiring early action.
- Up to 120 days. A few states measure the deadline from the last date of furnishing rather than the first.
Because these rules differ so sharply, anyone working across state lines needs to check the lien statute in each state where they have an active project. Assuming every state follows the same timeline is one of the fastest ways to lose lien rights.
What Happens If You File Late
Missing the deadline doesn’t always wipe out your lien rights entirely, but it does serious damage. In several states, a late notice limits your lien to the value of labor or materials you furnished after the notice was finally sent. Everything you provided during the period before the late notice may be legally unrecoverable through a lien. On a job where you shipped $80,000 in materials before realizing you missed the window, that’s a devastating loss.
Other states are harsher. A missed deadline eliminates the lien right completely, with no partial credit for later work. Even where partial recovery is allowed, judges scrutinize late notices closely. A late filer arguing they “substantially complied” faces an uphill battle, because courts generally treat preliminary notice statutes as strict requirements rather than loose guidelines.
If you discover you’ve missed a deadline, the situation isn’t hopeless, but your options narrow. You can still pursue a breach-of-contract claim against the party that hired you, and on larger projects there may be bond claims available. But a mechanics lien is the strongest collection tool in construction because it attaches to the property itself. Losing that leverage often means the difference between getting paid and writing off the debt.
What the Notice Has to Say
A preliminary notice is only as strong as the information it contains. Most states require at minimum:
- Your full legal name and address as the party furnishing labor or materials.
- The name and address of the contractor or subcontractor who hired you.
- The name and address of the property owner, or the owner’s designated agent (sometimes called a “designee”).
- A legal description or street address of the property being improved.
- A description of the labor performed or materials supplied, specific enough that anyone reading it can identify what you contributed.
Vague descriptions invite challenges. A steel supplier who writes “materials” instead of “structural steel beams and fasteners for the second-floor framing” is handing the opposing side an argument that the notice was defective. The description doesn’t need to be long, but it should be concrete enough that it couldn’t apply to half the trades on the project.
Finding the Owner and Property Information
The best source for owner and property details is the notice of commencement, a document that property owners in many states must record with the county and post at the job site before construction begins. It lists the owner’s name, the owner’s designated agent for receiving notices, the general contractor, a legal description of the property, and sometimes the lender. If the general contractor has a copy or one is posted on-site, start there.
When no notice of commencement is available, either because the owner failed to file one or because the state doesn’t require it, you’ll need to dig. The county recorder’s office and the county tax assessor’s website both maintain property records that include the legal description and ownership information. Title companies can also pull this data quickly, often at no charge if you have an existing relationship. Getting the property description wrong can invalidate the entire notice, so check it against recorded documents rather than relying on a street address alone.
When an owner fails to record a notice of commencement in a state that requires one, that failure typically works in the claimant’s favor. Courts in several states have held that an owner who doesn’t comply with their own notice obligations can’t penalize subcontractors and suppliers for imperfect compliance with theirs. The owner’s failure may also extend filing deadlines or excuse certain procedural defects in the preliminary notice.
How to Deliver the Notice
Delivery method matters almost as much as timing. Most states accept certified mail with a return receipt as the standard method, and it’s the best option for most filers because the green return-receipt card creates proof that the document reached its destination. As of January 2026, USPS charges $5.30 for certified mail plus $4.40 for a hard-copy return receipt, totaling $9.70 per recipient before postage. An electronic return receipt costs $2.82 instead of $4.40, bringing the total to $8.12.
Personal hand-delivery is another option, though it typically requires written acknowledgment from the person who accepts the document. Some filers hire a private process server, which runs $40 to $100 in most areas, with rush or same-day delivery adding $25 to $50. That route makes sense when the recipient has been difficult to reach by mail or when the deadline is dangerously close and postal delays would be fatal.
A few states now permit electronic service by email or through an approved online platform, but this is still the minority. Before relying on electronic delivery, confirm the state statute explicitly allows it. An email the recipient claims they never opened is much weaker proof of delivery than a signed return receipt.
Keeping Your Proof of Delivery
The return receipt, certified mail tracking number, or signed acknowledgment of hand-delivery is your evidence that you met the deadline. Store these with a copy of the notice itself in your project file. Some filers also prepare a sworn affidavit of service, a notarized statement confirming when, how, and to whom the document was delivered. It isn’t required everywhere, but it’s a powerful backup if the return receipt is lost or the recipient denies receiving the notice. The affidavit should identify the sender, the recipient, the method of delivery, the date of mailing or personal service, and a description of the document delivered.
Treat these records like insurance. You may never need them, but if a payment dispute escalates to litigation two years later, the ability to produce a certified mail receipt dated within the statutory window can decide the case.
Public Projects Work Differently
Everything above applies to private construction, where mechanics liens can attach to the land. Government-owned property is a different situation. You cannot file a mechanics lien against a public building, road, or other government-owned improvement. Federal, state, and local governments are immune from liens on their property.
Public projects are protected by payment bonds instead. On federal projects over $100,000, the Miller Act requires the general contractor to post a payment bond that guarantees payment to subcontractors and suppliers. If you have a direct contract with the general contractor, you can claim on the bond without giving any preliminary notice. If you’re a tier below, such as a supplier to a subcontractor, you must give written notice to the general contractor within 90 days from the date you last furnished labor or materials. The notice must state the amount claimed and identify who you furnished the labor or materials to.
The Miller Act requires that notice be served by a method providing written, third-party verification of delivery. Certified mail qualifies; regular first-class mail does not. Courts have held that the contractor must actually receive the notice within the 90-day period, so simply mailing it before the deadline isn’t enough if it arrives late.
Most states have their own versions of the Miller Act, often called Little Miller Acts, that impose similar bond requirements on state and local public projects, though the deadlines and procedures vary. Public-project notice deadlines are measured from your last day of work rather than your first, which is the reverse of most private-project preliminary notice deadlines.
Lien Waivers After You Get Paid
Once payment arrives, the other side of the notice process kicks in. A lien waiver is a document you sign confirming you’ve been paid and agreeing to give up your lien rights for the amount received. General contractors and property owners routinely require these with every pay application. There are two types, and the difference matters.
- Conditional waiver. Your lien rights are waived only after payment actually clears. If the check bounces or the wire transfer fails, the waiver is void and your lien rights remain intact. Sign this when payment has been promised but you haven’t confirmed the funds in your account.
- Unconditional waiver. Your lien rights are waived immediately upon signing, regardless of whether payment has cleared. Sign this only after the money is confirmed in your account and you’re certain it won’t be reversed.
About a dozen states have enacted mandatory statutory forms for lien waivers, meaning the waiver must follow the state’s prescribed language to be enforceable. In those states, a custom-drafted waiver that deviates from the statutory form may be thrown out. The cardinal rule everywhere is simple: never sign an unconditional waiver before the money clears. Contractors who sign unconditional waivers based on a promise of payment have no lien to fall back on when that promise breaks.