That Knot In Your Stomach
When An Invoice Goes Unpaid?
We Turn It Into Their Problem.
You did the work. They have your money. DemandFlow turns that into a professional, legally-formatted demand letter in 60 seconds — no lawyer, no retainer, no awkward phone calls. $29 once. Saying nothing costs $0 — and the entire invoice, forever.
Send a Demand Letter When a Client Doesn't Pay
A legally-formatted demand letter in 60 seconds. No lawyer needed.
100% Money-Back Guarantee
If the letter doesn't get you paid, we'll refund every cent. No questions asked. The only risk is leaving your invoice unpaid.
Choose a letter type:
This is exactly what you'll get — filled in with your details, ready to download the moment you check out.
$29 vs. the alternatives
A single unpaid invoice usually dwarfs the cost of getting it paid. Here's what recovering your money normally looks like:
| Option | Typical cost | Time |
|---|---|---|
| Hire a lawyer | $300–$500+ | Days to weeks |
| Collections agency | 20–50% of the invoice | Weeks |
| Write it off | 100% of what you're owed | Forever |
| DemandFlow | $29 flat | 60 seconds |
Need more than one letter? See our Pro plan →
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Built for people who do the work — and deserve to be paid
Freelance Designers
"Final files delivered" — then radio silence when the invoice is due.
Web Developers
The site is live and earning them money. Your last milestone? Still unpaid.
Writers & Consultants
You delivered the strategy. They ghosted the moment it was time to pay.
Photographers & Creatives
They used your photos everywhere — everywhere except the payment portal.
Contractors & Trades
The job's done and signed off, but the final check keeps 'getting lost.'
Small Business Owners
A late-paying client is quietly wrecking your cash flow this month.
The hard way vs. the DemandFlow way
Doing it yourself
- Google "how to write a demand letter" for an hour
- Second-guess every sentence — is this even legally sound?
- Pay a lawyer $250–$400 just for a first letter
- Wait days for a draft to come back
- Send something that looks amateur and gets ignored
- Give up and write off the money
With DemandFlow
- Pick your letter type and fill a short form
- Get airtight, professional legal language automatically
- Pay a flat $29 — no retainer, no hourly billing
- Download your finished letter in about 60 seconds
- Send a letter that looks like it came from a law office
- Get paid — or get your money back
How it works
Step 1
Tell us what happened
Pick your letter type and answer a few plain-English questions — who owes you, how much, and what happened. No legal jargon, no blank page staring back at you. Most people finish before their coffee gets cold.
Step 2
Pay $29, not $300
One secure Stripe checkout — no account, no subscription, no upsell maze. A lawyer charges $300+ in retainer fees for this exact letter. Think of the $29 as the cost of finally doing something instead of nothing.
Step 3
Hit send, feel different
Your letter appears instantly — real letterhead, precise legal language, ready to download as a PDF. Attach it to an email or mail it certified. The second you hit send, you stop being the freelancer who's still waiting.
What happens after you hit send
Sending the letter is the easy part. Here's the shift that usually happens next.
First
They open it
Not another email that looks like your usual invoice nudge. This one has letterhead, a reference number, and formal language. The tone shifts before they've read a single sentence.
Then
They realize you're serious
The specific deadline. The mention of "legal remedies." The fact that it doesn't sound like it was written in a hurry. It tells them this isn't the fourth polite reminder — it's the one where ignoring you finally has a cost.
Then
The money moves
Most clients who intend to pay do it within days of receiving a demand letter — often before the deadline you set even arrives. Silence turns into a bank notification.
The result
You feel it
That notification isn't just relief. It's proof that being direct works — and that you never needed to keep being polite about money you already earned.
Freelancers are getting paid
★★★★★“I'd sent three "just checking in" emails and got nothing back. The letter went out Tuesday morning — by Tuesday afternoon I had a Venmo notification for $450. I wish I'd used this three ghosted clients ago.”
Paid same dayJasmine T.
Wedding Photographer, Austin, TX
★★★★★“Client used my landing page copy live on their site for six weeks and wouldn't answer a single invoice email. Two days after the letter landed, the full $1,200 hit my account with an apology attached.”
$1,200 recoveredMarcus D.
Copywriter, Chicago, IL
★★★★★“It was a $3,800 final milestone on a SaaS build. My client kept saying "next week" for two months straight. One week after the letter, it was sitting in my Stripe account. No more calls, no more excuses.”
$3,800 recoveredPriya N.
Full-Stack Developer, Denver, CO
★★★★★“An $8,500 strategy engagement, invoiced in spring, still unpaid two months later. Chasing a company that size for money felt ridiculous — until the letter made it their problem instead of mine. Paid in full nine days later, interest included.”
$8,500 recoveredOwen R.
Business Consultant, Raleigh, NC
★★★★★“It was "only" $680, so I almost let it go — chasing small invoices always feels like more trouble than it's worth. Sent the letter Thursday morning, had the money by Thursday night. Now I send one the moment an invoice hits 30 days late.”
Paid same dayRenee K.
Brand Designer, Portland, OR
★★★★★“Finished a kitchen remodel in the spring. Homeowner kept "forgetting" the final $2,100 draw. My letter went out Monday — the check was in my hand by Wednesday. Didn't have to say a word to them directly.”
$2,100 recoveredDiego M.
General Contractor, San Antonio, TX
Illustrative examples reflecting the kind of outcomes DemandFlow letters are designed to produce. Names and identifying details have been changed.
Frequently asked questions
A demand letter is a formal written notice that requests payment for work completed. You should send one when a client has not paid an invoice after reasonable follow-ups — it puts your claim in writing, signals you're serious, and is often the step before small claims court.
Your professionally formatted demand letter is generated instantly after checkout — usually within 60 seconds. You can download it, save it as a PDF, and send it right away.
No. A demand letter does not require a lawyer. DemandFlow generates a legally-formatted letter based on your details that you send directly to your client. For disputes involving very large amounts or complex contracts, consulting an attorney is always an option.
We stand behind our letters with a 100% money-back guarantee. If you're not satisfied, email us and we'll refund your $29 — no questions asked. You've got nothing to lose and an unpaid invoice to recover.
Yes. All payments are processed by Stripe, a PCI-DSS Level 1 certified payment provider — the same infrastructure used by Amazon and Google. DemandFlow never sees or stores your card details.
We only use the details you enter to generate your letter. We don't sell your data, and your letter is yours to keep. See our Privacy Policy for the full details.
Stop Chasing. Start Collecting.
Every day you wait is another day your money sits in someone else's account. Send a letter that gets taken seriously — in the next 60 seconds.
Make Them Pay — $29Backed by our 100% money-back guarantee.