The client signed off. You sent the invoice. Then a chargeback notice hits your inbox claiming the work was never delivered, or the email lands saying you charged for things you "never agreed to" do. You know the dispute is not real. The hard part is proving it in writing without sounding like you are losing your temper.
What a Fake Dispute Actually Looks Like
A fraudulent dispute is not the same as a real disagreement about scope or quality. It is a client filing a complaint they know is false, usually to get the work for free or to delay paying. Common patterns include claiming the job was never completed when you have signed acceptance, denying authorization for work they explicitly approved by text, or telling a payment processor they never received services that were delivered in person.
Before you call it fraud in writing, be honest with yourself. If the client has a legitimate complaint you are ignoring, that is a standard invoice dispute and needs a different letter. Fraud is when the facts they are stating to you, to a card issuer, or to a payment platform are demonstrably untrue.
Document the Fraud Before You Write a Word
Your letter is only as strong as your evidence. Pull everything into one folder before you draft anything. The fraud claim falls apart when your timeline is airtight.
- The signed contract, estimate, or written approval (including text and email threads)
- Change orders or scope confirmations the client approved in writing
- Time-stamped before-and-after photos of completed work
- Signed completion or sign-off forms, if you have them
- The original invoice and any payment confirmations
- Screenshots of the dispute notice from the processor or card issuer
- Every text, email, and voicemail where the client acknowledged the work or the bill
If the dispute went through a card processor or platform, fight that case first with the same evidence. The processor decision gives your letter extra weight either way.
What to Put in the Letter
This letter is not a polite reminder. It is a written record that you have identified specific false statements and you intend to act on them. Keep the tone cold and factual. Anger weakens it.
- Your name and business, plus the client's legal name as it appears on the contract
- The invoice number, date, and exact amount in dispute
- A short summary of the work that was performed and accepted
- The specific false statement the client made (to you, to the processor, or to the bank)
- The evidence that contradicts each false statement, listed by exhibit
- A clear payment deadline of 10 to 14 days
- The next legal step if payment is not made by the deadline
Quote the false statement directly when you can. "On October 14, you told [processor] that services were never rendered. Attached are photos taken at your property on September 28, your signed acceptance dated September 30, and your text on October 2 thanking us for the work."
Name the Fraud Without Overreaching
You can describe the client's conduct as a "knowingly false statement" or "misrepresentation" when you have the evidence to back it up. Avoid throwing around terms like "criminal fraud" unless you have spoken to an attorney. Civil courts handle the kind of misrepresentation that gets you paid back. Criminal fraud is a separate matter handled by prosecutors.
A line that works in most letters: "The statements made in your dispute are contradicted by the attached documentation and constitute a material misrepresentation. I intend to pursue full recovery of the unpaid invoice, plus any chargeback fees and filing costs, in small claims court."
Reference Small Claims Court and Recoverable Fees
Most states allow you to recover the disputed amount, chargeback fees the processor charged you, court filing fees, and sometimes interest. Name the exact court for your state and the small claims limit. The point is to show the client you have already done the math on filing.
If the disputed amount is above your state's small claims limit, mention civil court instead. Either way, attach copies of the chargeback fees from your processor so the recoverable amount is on the record from day one. The chargeback demand letter approach covers the fee documentation in more detail.
How to Send It
Send the letter by email and by certified mail with return receipt. Email creates the timestamp; certified mail proves delivery. Keep the USPS tracking number with the rest of your file.
If the dispute was filed with a payment processor, send a copy of the letter to the processor's dispute team as part of your evidence packet. It shows you have notified the client directly and gives the processor a written record of the client's contradiction.
If the Deadline Passes
Two things happen next. First, you file in small claims court for the invoice plus the chargeback fees and filing costs. Second, if the false statements were made to a bank or processor, you keep that documentation: card networks track repeat fraudulent disputes, and so do platforms like PayPal and Stripe.
Walk into the courtroom with the same folder you built at the start, plus the three letters and the certified mail receipts. Judges do not need long arguments. They need a clean timeline showing what was promised, what was delivered, what was paid, and what the client said that was not true. The small claims filing process is straightforward once your file is built.
Getting the Letter Written
Writing a fraud-tinged demand letter is where most contractors either understate the case or go too far and undercut themselves. PaperHammer drafts all three escalating versions for you in under 5 minutes: you describe the dispute, the false statements, and your evidence, and the system produces a polite, firm, and final-demand letter calibrated to your state's small claims limit. You can edit each one before you download. It is not legal advice, but it is the letter you would write if you had the time and the right reference language in front of you.