Proving the Claim and the Records That Support It
A bond claim is an accounting exercise before it is a legal one. The claimant must show what was furnished, that it went into the bonded work, what it was worth, and what remains unpaid once every payment and credit has been applied to the account.

The rule in short
A payment bond claimant must prove that it furnished labor or material, that the labor or material was furnished in carrying out the bonded contract, the reasonable value or agreed price of what was furnished, and the balance unpaid after all credits. Each element is established from ordinary project records rather than from correspondence. A claim presented as a reconciled account with supporting documents is evaluated on the merits; one presented as a demand figure is not.
Bond claims are decided on documents. The legal questions are usually narrow and the factual ones are usually arithmetic: what was supplied, whether it went into the bonded work, what it was worth, what has been paid and what is left. A claimant who can answer those four questions from contemporaneous records will be evaluated on the merits. One who cannot will be met with a request for documents and then with a denial for want of proof.
The four things that must be established
The first is that the claimant furnished labor or material. The second is that it was furnished in carrying out the work provided for in the bonded contract, which is a narrower proposition than having supplied something to a party who happened to be working on the project. The third is value: either the agreed price under the arrangement or, where no price was agreed, the reasonable value of what was supplied. The fourth is the unpaid balance after all payments and credits.
Each maps to a different set of records. Furnishing is proved by delivery tickets, daily reports, payroll records and time sheets. Connection to the bonded work is proved by the project identification appearing on orders and tickets, by site signatures, and by correspondence naming the project. Value is proved by the contract or purchase order and by invoices consistent with it. The balance is proved by a reconciled account rather than by a statement of the amount demanded.
The second element is the one claimants underestimate. Supplying goods to a contractor who was working on the project is not the same as supplying them for that project, and the difference becomes visible when a customer runs several jobs at once. Orders that name the project, tickets signed by someone at the site and job cost coding maintained in the ordinary course all establish the link. Where those are missing, the claimant is left arguing from inference about where fungible goods ended up.
The account and how it is presented
The most common defect in a submitted claim is a demand figure with no reconciliation behind it. A surety evaluating a claim needs to see the total charged, each payment received, the date of each payment and the invoices to which it was applied, any credits for returns or backcharges, and the resulting balance. Where payments were received without direction as to application, the claimant should record how they were applied and on what basis, since the application affects both the balance and the age of the outstanding charges.
Backcharges deserve separate treatment rather than netting. A claimant that quietly absorbs a disputed backcharge into the account loses the ability to contest it later and invites the argument that the reduced figure was agreed. Setting the charge out, stating the position on it and reserving the dispute preserves the point without obstructing evaluation of the rest.
A claimant is not required to work from the subcontractor's description of the bond. The federal statute directs the agency to furnish a certified copy of the payment bond and the contract to any person who applies and submits an affidavit that the person supplied labor or material for the work and has not been paid, or that the person is being sued on the bond. The certified copy is prima facie evidence of the contents, execution and delivery of the original, and the acquisition regulation directs agencies to provide the information.
| Record | What it establishes | Weakness when absent |
|---|---|---|
| Signed delivery tickets | That material reached the project | No link between the goods and the bonded work |
| Purchase order or subcontract | The agreed scope and price | Value falls back to reasonable value, contested |
| Payroll and time records | Labor performed and its cost | Hours become an estimate rather than a record |
| Reconciled statement of account | Charges, payments, credits and balance | The claim reads as a demand, not a computation |
| Signed change orders | Authorization for extra work | Extras are treated as volunteered |
| Conditional waivers and releases | What was released and on what condition | Risk that a release is read as unconditional |
Extras, changes and the volunteer problem
Work outside the original scope generates a large share of disputed balances. The bond secures payment for labor and material furnished in carrying out the contract, and a surety will resist charges that appear to have been undertaken without authority. Proof of authorization is therefore part of the claim: a signed change order, a written direction, or at minimum a contemporaneous record of the instruction and the party who gave it.
Where the parties proceeded informally, as often happens under schedule pressure, the claimant should assemble what exists rather than reconstruct what should have existed. Field directions, daily reports noting the instruction, emails confirming the request and the pattern of prior changes handled the same way are all admissible and are frequently sufficient. What does not work is an invoice for extras issued at the end of the job with no trace of the work having been directed.
A related trap is the invoice issued at a rate different from the one agreed. Where a claimant billed extras at a premium rate without a written basis for it, the surety will pay at the contract rate and litigate the difference. Establishing the rate at the time the work is directed, even by a short written confirmation, converts a contested valuation into an arithmetic one.
Waivers, releases and what they cost
Progress payments on construction projects are commonly exchanged for waivers and releases, and the documents signed along the way limit what may later be claimed. California prescribes statutory forms and provides that a waiver given in exchange for a progress payment is void unless it follows the prescribed form, which distinguishes a conditional release effective only on receipt of payment from an unconditional one. A claimant that signed unconditional releases for payments never received has created a serious obstacle to its own claim.
Two protective points follow. Conditional forms should be used wherever the payment has not cleared, and exceptions for disputed items and pending change orders should be listed rather than assumed. Under the federal statute a waiver of the right to sue on a required payment bond is void unless it is in writing, signed by the person whose right is waived, and executed after that person has furnished labor or material. Sureties nevertheless raise release arguments routinely, and how they are framed is set out in defenses the surety will raise. The related question of what a joint check settles is addressed in joint check arrangements and what they prove, and the records described here must be assembled before the period in the deadline to sue on a payment bond expires.
Points to carry away
- The claimant must connect what was furnished to the bonded contract, not merely to the site or the customer.
- The account must be reconciled, showing charges, payments, credits and the applications of each payment.
- Delivery records signed at the site are the strongest evidence that material entered the bonded work.
- The agency must furnish a certified copy of the bond and contract on an affidavit of non-payment, and the copy is prima facie evidence.
- Change orders and extra work require the same proof of authorization as base scope work.
Questions readers ask
How is a payment applied when the parties did not say?
Where the payer gives no direction, the payee may generally apply the payment as it chooses among the payer's debts, and where neither directs, the law applies it to the oldest obligation. On a bond claim this matters, because payments applied to older invoices leave a balance made up of the most recent charges, while payments applied to a different project may leave the bonded account intact. Claimants who receive funds without direction should record the application they made and why.
Does material delivered to a yard rather than to the site qualify?
It can, if the claimant shows the material was furnished for use in the bonded work. Courts have accepted delivery to a fabrication shop, a staging yard or a subcontractor's premises where the goods were identified to the project. What defeats the claim is an inability to trace the material anywhere. A supplier delivering fungible stock to a customer's warehouse, without project identification on the order or the ticket, faces a serious proof problem whatever the commercial reality.
Can interest and attorney fees be recovered on a bond claim?
It depends on the governing statute, the bond wording and the underlying contract. The federal statute is silent on fees, and courts have looked to the subcontract or to state law where it applies. Several state statutes expressly allow a prevailing claimant reasonable attorney fees on a public work bond, and some fix conditions such as a waiting period after the notice of claim. Interest is more commonly available, at the contract rate where one exists and at the statutory rate otherwise.
Sources
- 40 U.S.C. § 3133 (Cornell LII)Entitles a claimant to a certified copy of the bond and contract, which is prima facie evidence.
- FAR 28.106-6 — Furnishing informationDirects the agency to furnish bond and contract information to persons who supplied labor or material.
- 40 U.S.C. § 3131 (Cornell LII)Defines the protected class by reference to labor and material supplied in carrying out the contract.
- California Civil Code § 9554Conditions the bond on payment in full of claimants and allows a reasonable attorney fee fixed by the court.
- Washington Revised Code § 39.08.030Prescribes the form of the written claim and allows attorney fees subject to a waiting period.
- California Civil Code § 8132Prescribes the conditional waiver and release form used to document progress payments.
Pinnacle Law Review is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
More in Surety & Payment
Defenses the Surety Will Raise
A surety defending a payment bond claim asserts, in sequence, that the claimant is outside the protected class, that the statutory notice was defective or late, that the action was untimely, that the claim was released or already paid, that the amount is wrong, and that the penal sum is exhausted. It may also assert the defenses the principal itself would have against the underlying obligation. Statutory waiver restrictions limit the release defense on required bonds.
The Surety's Indemnity Against the Contractor
A surety that pays under a bond has a right to recover from its principal, arising both from the general law of suretyship and from the general indemnity agreement executed before the bond issued. The agreement typically extends to losses, costs and fees, permits the surety to settle claims at its discretion, requires collateral on demand once exposure appears, and binds affiliated companies and individual owners personally. Its reach is far wider than the common law right alone.
Who May Claim, by Tier
A payment bond protects persons who furnished labor or material in carrying out the bonded work, but the class is limited by contractual distance from the prime contractor. Persons in privity with the prime form the first tier and generally need give no notice. Persons in privity with a subcontractor form the second tier and must give notice. Suppliers to suppliers usually fall outside the class entirely, and whether a party is a subcontractor or a supplier decides the tier.


