Your client owes you. Make it impossible to ignore.
Turn an overdue invoice into a professional demand letter in minutes — documented, sent certified by mail and email, and escalated until it's paid. Most get resolved before anyone files anything.
Flat fee. We never take a cut of what you recover. B2B only.
Built for businesses that invoice on terms — and get burned for it
You did the work. You sent the invoice. Now it's 30, 60, 90 days past due and your emails are read but not answered.
If one overdue invoice is worth more than a few thousand dollars, but not worth $400 an hour to a litigator — this is for you.
Three ways to chase a payment. They all cost you.
The "just circling back" email
Free, polite, and easy to ignore. Overdue debt gets harder to collect every week it ages.
A collection agency
Takes a third to half of whatever it recovers — and torches the client relationship doing it.
A lawyer at $400/hour
The right call for a real dispute. Absurd for an $8,000 invoice — you'll spend the retainer first.
There's a gap in the middle, and that's where almost every overdue invoice lives. That gap is the product.
From overdue to recovered in six steps
Everything a stalled invoice needs, nothing it doesn't
Documents everything
Invoice, terms, payment timeline, and a hard deadline — the record you'd want if it ever goes further.
Real attorney, real letterhead
Reviewed and signed by a licensed attorney. A notice from counsel lands differently than a note from a vendor.
Sent and tracked for you
Certified mail and email with delivery confirmation. No trip to the post office.
Escalating follow-ups
A firmer second notice, then a final one — on a schedule, so you don't have to keep circling back.
Built for repeat use
Late payment recurs. Send as many letters as you need and keep your disputes in one place.
An escalation path that's there
If a letter isn't enough, you're not back to square one — small claims prep or litigation referral, documentation ready.
Backed by Trarian. We build AI underwriting and legal infrastructure for the people who finance and insure legal disputes for a living. This is that rigor, pointed at your overdue invoices.
A demand letter isn't only for invoices
Get out of an unfair contract
Stuck in an auto-renewing vendor agreement, or paying for something a supplier never delivered? We draft the notice that documents the breach and states your terms for getting out.
Move a stalled dispute forward
When a counterparty is stonewalling, a documented demand with a deadline creates a record and forces a response. It turns "they keep ignoring me" into "the clock is running."
Flat fees. No percentage of what you recover.
Most disputes are resolved at the demand-letter stage. If yours isn't, we help you prepare a small claims filing or connect you with counsel for larger litigation. Attorney fees and court fees apply at that point.
The things people ask first
Is this a real demand letter?
Yes. The $49 letter documents the debt and formally puts the recipient on notice. The $200 version is reviewed and signed by a licensed attorney and sent on law firm letterhead, which carries more weight.
Is this a collection agency?
No. We're a flat-fee document and legal service. We don't take a cut of what you recover, we don't buy your debt, and we focus on business-to-business invoices. You stay in control.
Will this hurt my client relationship?
It's firm, but professional — and you approve the tone before anything goes out. Compared to a collection agency taking 40% and harassing your client, a clean demand letter is the relationship-preserving move. Plenty of clients pay and keep working with you.
What if they still don't pay?
First we keep the pressure on with escalating follow-ups. If that still doesn't do it, we help you prepare a small claims filing or connect you for larger litigation, with your documentation already organized. Court and attorney fees apply at that stage.
Can I send more than one?
Yes — and most of our customers do. Late payment tends to be a recurring problem, so the service is built for repeat use. Ask us about volume if you're sending them regularly.
What's Trarian?
Trarian builds AI underwriting and legal infrastructure for litigation funders, insurers, and legal teams. RecoverUnpaidInvoices.com brings that same rigor to everyday B2B collections.