Right now, any client can say they never got your invoice and there is nothing you can do about it. InvoiceProof changes that.
Sources: FreshBooks, Freelancers Union, Bonsai, 2022 to 2024 payment surveys
Create your invoice, import line items from a CSV, or pull clients and invoices directly from QuickBooks. Send it in one click. Your client gets a link. No account, no app, nothing to install.
The moment your client opens the email or views the invoice, we record it. IP address and timestamp on every action, locked into a tamper-evident log they cannot dispute.
One click generates a complete Chain of Custody document showing every event in sequence. Attach it to a demand letter, send it to a collections agency, or share it with an attorney. Your record is already built.
Every unprotected invoice is a risk
Protect your next invoice — free for 7 days.Every open is locked into a cryptographic chain. Alter one entry and the chain breaks. This is not just a log. it is evidence that holds up when money is on the line.
Not just "viewed." We capture their IP address and the exact time they opened it. When they say they never saw it, you have the IP and timestamp to prove otherwise.
Your client signs directly on the invoice. Their signature is stored with their IP address, timestamp, and a written acknowledgment that they received and reviewed the document. Consistent with U.S. ESIGN Act requirements.
One click generates a complete Chain of Custody document showing every event in sequence. Share it with a collections agency, attach it to a demand letter, or hand it to an attorney. Any third party can verify it has not been altered.
None of these features exist in FreshBooks, Wave, or standard invoicing tools.
| Feature | InvoiceProof |
|---|---|
| See when they opened it (IP logged) | ✓ |
| Tamper-evident hash-chained log | ✓ |
| E-signature with acknowledgment | ✓ |
| Chain of Custody document | ✓ |
| Public hash verification URL | ✓ |
Based on publicly available product documentation as of March 2026. Subject to change.
“A client pushed back on a $5,200 invoice, said she never got it. I pulled up the audit log and showed her the exact date and IP address it was opened from. She stopped responding and paid two days later.”
“I had a contractor dispute a $3,800 payment claiming the invoice was never delivered. I forwarded him the Chain of Custody document. He called his accountant, found the invoice, and paid the same week.”
7-day free trial. Card required. No charge until trial ends.
Send it. We record everything. They cannot deny it.
Everything you need to send an invoice and win a dispute.
Setup takes 5 minutes. Your next invoice will be the last one a client can dispute without proof.
Every invoice you send carries a built-in audit trail. Nothing for your client to install. No change to how they receive invoices.
Send your first protected invoice todayCard required. No charge until trial ends. Nothing for clients to install.