Common questions

Yes. We require a card so there's no interruption if you continue. You won't be charged until the trial ends. Billing starts automatically after that.

Both plans include read receipts with IP logging, a tamper-evident audit trail, Chain of Custody document, email open notifications, payment reminders, CSV/Excel import, client-facing invoice view, and public hash verification. Starter is capped at 30 invoices per month and does not include e-signature capture, QuickBooks sync, or the demand letter feature. Pro removes the cap and adds all three.

Yes, at any time. Upgrades take effect immediately. Downgrades apply at the start of your next billing period.

Go to Settings → Manage billing. You can cancel your subscription from the billing portal at any time. Your account remains active until the end of your current billing period.

Your invoices, audit trails, signatures, and client records are retained for 90 days after cancellation. You can request a full export at any time during that window by emailing support@invoiceproof.io.

Any invoice you send through InvoiceProof. Drafts you save but haven't sent don't count toward your monthly limit.

When your client opens the invoice link, our server records their IP address and the exact time. This happens automatically. Your client does not need to do anything. The IP address is logged with each view, so if they open it multiple times you will see each event separately.

Every event on an invoice (created, sent, opened, signed, paid) is stored with a SHA-256 hash that includes the hash of the previous event. This creates a chain where any retroactive change to a record breaks the chain and becomes detectable. It's the same principle used in blockchain, applied to invoice tracking.

It's a formatted document showing every event on an invoice in sequence: timestamps, IP addresses, hashes, and any signatures. It's designed to be attached to a demand letter or presented in small claims court or mediation. Export it from the invoice list by clicking "Export PDF."

Yes. The invoice page displays a notice that the session is being logged by InvoiceProof. Transparency is both the ethical approach and part of what makes the record credible. A client who knows their open was logged is less likely to later claim they never received it.

Every Chain of Custody document includes a public URL at invoiceproof.io/verify/[hash]. Anyone (a lawyer, a mediator, a judge) can visit that URL and independently confirm that the document hasn't been altered, without needing to trust InvoiceProof's word.

When you enable e-signature on an invoice, your client is shown a signature canvas on the invoice page. They draw their signature, type their name, and check a box confirming they've read and agree to the invoice terms. The signature is stored with their IP address and timestamp.

The signature is captured in a way that's consistent with the basic requirements of the U.S. ESIGN Act (15 U.S.C. § 7001). It includes intent to sign, identity (name + IP), and a record of acknowledgment. Whether it's enforceable in a specific dispute depends on the nature of the agreement, the jurisdiction, and applicable law. We recommend consulting a lawyer for formal proceedings.

Yes. When you enable e-signature on an invoice, you won't be able to mark it paid until the client has signed. This creates a clear record of acknowledgment before payment.

Connect your QuickBooks account from the QuickBooks page in your dashboard. Once connected, you can browse your open QuickBooks invoices and import them into InvoiceProof in one click. All line items and client details carry over. Once sent, the audit trail works exactly the same as any other InvoiceProof invoice.

Yes. When you mark an invoice as paid in InvoiceProof, you'll see a "QB Sync" button that pushes the payment status back to QuickBooks.

The demand letter template is a Pro feature that generates a pre-filled formal payment demand letter using your invoice data and audit trail. It pulls in the invoice number, amount, client name, due date, delivery date, open count, client IP address, and a link to your public Chain of Custody verification. It opens in your browser. Click Save as PDF to download it. Review and edit all bracketed fields before sending.

No. It is a template for informal dispute resolution: a formal written request for payment. It is not a legal document, is not filed with any court, and is not a substitute for legal advice. For formal proceedings, consult a lawyer. That said, a written demand letter is often all that is needed to resolve a payment dispute before it escalates.

Go to Invoices → New Invoice. Add a client (or create one), fill in the title, due date, and line items, then click "Preview & Send." You'll see a preview of what your client will see before it goes out.

Yes. On the new invoice form and the edit form, click "Import from CSV/Excel" and upload a CSV or tab-separated file. The format is: Description, Quantity, Unit Price. A header row is detected and skipped automatically.

No. Once an invoice is sent, the record is locked. Editing a sent invoice would undermine the audit trail. If you need to make changes, you can send a new invoice or discuss the change with your client directly.

Every sent invoice has a persistent URL at /invoice/[token]/status that your client can bookmark. It shows the current status of the invoice, the amount due, and a Sign Now button if signature is still required. Visiting this page does not log a new view event. It's purely informational.