Sign inVerified Badge
AI can fake an invoice in seconds. Prove yours is genuinely you.
A scammer can now knock up a convincing fake invoice with your name and branding on it in seconds, and send it to one of your clients. Seal your real invoice first: a hash and identity-verified proof of what you actually sent, so your client can check before they pay.
Free to start, no card required — takes about a minute to set up.
How it works
1. Verify once
A one-time government-ID check (about a minute, hosted by Stripe). Reused across every future seal — no re-scanning your ID each time.
2. Seal the invoice
Just upload your finished invoice PDF from your dashboard — SignedBy hashes it, timestamps it, and generates your badge.
3. Embed the badge
Drop the badge on your invoice before you send it. A client scans it and lands on a public ledger page — no account needed.
What this actually proves
A Verified Badge is a provenance and integrity proof, not a fraud-detection tool. It confirms this exact file existed, unaltered, as of a cryptographically verified timestamp, sealed by an identity-verified person — a real, useful, different claim from “this looks legitimate.” Honest framing, on purpose: overclaiming here would undercut the one thing that actually holds up under scrutiny.
Generate Your Proof
Free to start — 3 seals a month included, no card required. Need more? Pro plan or higher gets unlimited sealing, no per-seal charge.
Generate Your Proof →Frequently asked questions
Does this stop someone from faking my invoice?
No — and it doesn't claim to. A Verified Badge proves your real invoice existed, unaltered, as of a cryptographically verified timestamp, sealed by an identity-verified person. That gives your client an actual way to check instead of just trusting that an email looks right — it isn't a guarantee nothing bad can ever happen.
What does the client actually see?
A badge on your invoice — a QR code, the SignedBy mark, and a short verification link as plain text, so it reads as legitimate even printed or screenshotted. Scanning or visiting it lands on a public ledger page: your name, when the file was sealed, and confirmation it hasn't been altered since. No account or login needed to check it.
What if my identity check is old?
Your first seal verifies your identity via a government-ID check (about a minute, hosted by Stripe). Later seals reuse that same verified check rather than re-scanning your ID every time — cheaper and faster. The ledger page always shows "identity verified on [date]" alongside "sealed on [date]" as two separate facts, so it's clear if the identity check itself is from earlier than this specific seal.
Does this work for non-PDF files?
PDFs only for now. If your invoice comes from accounting software as something else, export or print it to a PDF first, then seal that.
What plan do I need?
Any plan, including Free, no card required. Free includes 3 Verified Badge seals a month. Pro plan or higher gets unlimited sealing, no per-seal charge. Seal a file right from your dashboard's New Document menu — developers can also do this from Console chat or the API, see the developer docs.
What actually makes the timestamp "cryptographically verified"?
Every seal is submitted to a real Time Stamping Authority (Sectigo's public RFC 3161 service, with FreeTSA as an automatic fallback if Sectigo can't be reached) that signs the file's hash together with the time. That's independently verifiable by anyone, trusting only the TSA — not just a date in SignedBy's own database. The ledger page at signedby.ai/verify shows which TSA backed a given seal.
Also on SignedBy: Console · Magic Quote · Verify a document · API & MCP docs