The Federal Miller Act Payment Bond Claim Notice and Service Requirements Are Not as Simple as They Seem

September 16, 2026

1. Must the Notice Include An Explicit Demand for Payment?

The Miller Act text does not say so. Read literally, the Federal statute requires only an accurate dollar amount and the name of the party for whom the labor or materials were furnished. Yet some courts have added a fourth, unwritten requirement: that the notice must communicate, expressly or by clear implication, that the claimant is seeking payment from the prime contractor, not merely informing the prime contractor of an unpaid job account as a matter of record-keeping. One court case identified four requirements: the notice must (1) be timely; (2) be in writing; (3) state with substantial accuracy the amount claimed and the name of the party to whom the labor/materials were furnished; and (4) convey the notion that the claimant is looking to the prime contractor for payment, rather than simply informing the contractor of the balance owed to the claimant on the federal project. Other courts, applying a more literal reading of the statute, decline to impose an independent “demand” element and instead ask only whether the notice satisfies the two things explicitly identified in the Miller Act: the bond claim amount and its customer on the federal job. The practical dividing line in most case law is between a notice that reads as a pure informational status update, and one that a reasonable prime contractor would understand puts its bond obligation on notice. Courts applying the fourth factor have been willing to find an implicit demand from context (for example, correspondence referencing nonpayment and threatening further action) without the claimant using the word “demand” or citing the Miller Act by name.

Practical takeaway: Because the case law is split on whether an implied demand suffices, and because the cost of guessing wrong is losing the bond claim outright, the prudent course is always to include an express statement that the claimant is unpaid and is looking to the prime contractor and its surety for payment of the stated amount, not merely to recite a job account balance.

2. What Does “Substantial Accuracy” Mean for the Dollar Amount?

Courts do not require the claimed amount in the notice to match, to the penny, the amount ultimately proven at trial or the amount awarded in judgment. “Substantial accuracy” is understood as a good-faith, reasonably approximate statement of what is owed at the time the notice is sent, not a final accounting. Because the notice is typically sent before litigation, before an accountant has reconciled change orders, and sometimes before the claimant’s own final invoice is issued, courts tolerate some variance between the notice amount and the amount ultimately recovered, so long as the claimant was not attempting to inflate the claim, and so long as the prime contractor was not misled about the scope or magnitude of the exposure it faced. A notice that substantially understates the claim can also create problems, since some courts have limited recovery to the amount stated in the notice on the theory that the prime contractor is entitled to rely on the figure given to gauge its own risk and reserve accordingly. Other courts allow recovery of the amount actually proven at trial even if it exceeds the notice figure, provided the excess did not result from an attempt to mislead. Given this uncertainty, claimants are best served by giving their best good-faith estimate, updating it if a large change becomes known before the 90-day window closes, and avoiding both padding and lowballing the bond claim amount, since either extreme increases litigation risk over whether the “substantial accuracy” requirement has been satisfied.

3. Does the Notice Have to Identify the Project, and If So With How Much Specificity?

Nothing in the Miller Act requires the notice to identify the project at all: the two express content requirements are the amount claimed and the name of the party for whom the labor or material was furnished. In practice, however, project identification functions as a practical necessity rather than a freestanding statutory element. For example, a prime contractor that works on multiple federal jobs at once cannot act on a notice, match it to the correct bond and correct subcontract chain, or forward it to the correct surety, unless it can tell which project the notice concerns. Courts applying the Miller Act’s remedial, liberal-construction mandate have generally been forgiving about form – a notice does not fail merely because it omits magic words or a formal caption – but the underlying purpose of the notice requirement is to make the prime contractor aware of claims from second-tier subcontractors and materialmen that the general contractor would otherwise be unaware of. Where a notice is so generic or ambiguous that the prime contractor is unable to reasonably identify the project or the claim, courts are far less forgiving, because at that point the notice fails to serve the Miller Act’s core function regardless of how liberally the statute is construed. As a matter of best practice, notices should routinely include the project name, location, contracting agency, prime contract number if known, and ideally, the payment bond number, even though none of these is an explicit statutory requirement.

Practical takeaway: Identify the project with enough specificity (name, location, awarding agency, and if possible, contract/bond number) that a reasonable prime contractor juggling several federal jobs could immediately locate the correct project file. Even though the Miller Act does not list this as a separate requirement, its absence can doom an otherwise “substantially accurate” notice for failing to satisfy the statute’s underlying purpose.

4. What Methods of Service Are Acceptable: E-mail, Overnight Courier, or Only Certified Mail?

In 2002, the Miller Act relaxed the service provision considerably. Before 2002, the statute specified more rigid delivery mechanisms. The current version requires only that notice be served “ by any means that provides written, third-party verification of delivery to the contractor at any place the contractor maintains an office or conducts business or at the contractor’s residence,” or in any manner in which a U.S. marshal could serve a summons. Certified mail, return receipt requested, remains the gold standard precisely because it produces a government-generated, third-party verified delivery record. However, the statutory language is not clear: a properly tracked overnight or express courier delivery (FedEx, UPS) that generates third-party proof of delivery satisfies the statutory requirement just as certified mail does, and several courts have approved such delivery methods. Personal service by an individual capable of testifying to delivery, or service in the manner a U.S. marshal would use, is also expressly authorized.

Email is a much trickier case. An ordinary email, without a delivery/read receipt from a third-party mail system, or without some other independent proof that the specific message reached the contractor at its office or place of business, does not on its face provide the kind of third-party verification of delivery the statute demands (the sender’s own “sent” folder is not third-party proof). However, the courts have historically been forgiving about the manner of service where actual receipt is undisputed. In one case, the Court held that written notice sent by regular (not registered) mail was sufficient once actual receipt was acknowledged, distinguishing the timing requirement (which is a strict condition precedent) from the manner-of-service requirement (which is not). That reasoning suggests email should likewise be acceptable where actual receipt by the contractor is not disputed. However, bond claimants who rely solely on email without any read receipt, delivery confirmation, or other corroboration are taking an unnecessary risk if the prime contractor later denies receipt, because the claimant then bears the difficult, if not impossible, burden of proving delivery with no independent record to establish it.

Practical takeaway: Certified mail (return receipt requested) or a tracked courier service remains the safest mode of service because they generate a third-party delivery record. If email is used, it should be supplemented: have it sent alongside a tracked hard-copy notice or accompanied by some independent confirmation of receipt rather than relied upon alone, given the absence of settled court authority squarely approving email-only service as “third-party verification of delivery.”

5. Can Notice Be Given Too Early?

Yes, and this is a trap that can generate some unfortunate results for federal payment bond claimants. The Miller Act requires notice “within 90 days from the date on which the person did or performed the last of the labor or furnished or supplied the last of the material for which the claim is made.” Some courts have read this as a two-sided window, not merely an outer deadline: notice given more than 90 days before the claimant’s last date of furnishing labor or material can be just as fatal as notice given more than 90 days after the date of last furnishing. In one recent case, involving an $8.5 million payment bond claim on an air base project, the subcontractor argued that even if its notice predated what the sureties contended was its actual last day of work, its bond claim notice should still suffice because it gave “too much” notice – that is, more advance warning than the statute required. The Court rejected that argument, holding that the Miller Act “demands strict compliance with certain conditions precedent to the right to recover,” and that the 90-day notice provision must be read as a strict window keyed to the actual last date of furnishing, not a one-way deadline that can simply be beaten by serving the notice early. Because the claimant’s notice was not given within 90 days of the last date of work, whether that last date was the earlier date the sureties urged or the later date the claimant urged, the payment bond claim was barred either way. The Court’s message was clear: sending notice “early,” on the assumption that early is always safer than late, can be just as fatal as sending it late, because the Miller Act ties the notice window to the actual date of last furnishing.

Practical takeaway: Do not send Miller Act notice preemptively based on an anticipated or scheduled completion date. If the claimant has, in fact, furnished its last labor or material to the project, then send notice promptly, ideally as soon as practicable but in any event within 90 days from that actual date of furnishing.

Conclusion

The Miller Act’s notice provision is short on words, which renders it ripe for disputes and litigation. The unifying thread across all five issues is the same tension noted at the outset: the Act is remedial legislation entitled to liberal construction in the claimant’s favor on questions of form, but the 90-day notice deadline itself, and the two substantive elements Congress did specify (the claim amount and the name of the bond claimant’s customer), are treated as strict conditions precedent that some courts will enforce mechanically. A claimant who wants to avoid losing their bond claim should treat the statutory minimums as a floor, not a safe harbor: state an express demand for payment rather than relying on implication; give a good-faith, reasonably current dollar figure rather than a stale or padded amount; identify the project with enough specificity that the prime contractor can act on the notice immediately; serve by certified mail, return receipt requested or a tracked courier (supplementing, rather than replacing, any email notice) to guarantee third-party proof of delivery; and resist the urge to send notice too early, waiting until the claimant’s work is actually finished before starting the 90-day notice clock.

If you need assistance with a construction lien or payment bond claim, please contact KMK Attorney David M. Henry by phone at (414) 961-4813 or by e-mail at dhenry@kmksc.com or Attorney Lance E. Duroni by phone at (414) 961-4857 or by e-mail at lduroni@kmksc.com.