Every set you stamp carries a live, scannable seal. Anyone holding the file can confirm in seconds that it's authentic, current, and authorized by you — straight from the source, not from the ink on the page.
Once a sealed PDF leaves your office, you lose sight of it. A stamp is just ink — it can be lifted from one drawing and dropped onto another, photocopied onto a set you never approved, or walked into a building department under your license without your knowledge. An old revision gets passed off as current. By the time you hear about it, it's already been relied on. You carry the liability for a document you no longer control.
Upload your set and apply your SealGuard seal. We bind a tamper-evident QR to the exact bytes of the PDF and register it under your verified license.
Send the sealed PDF anywhere — client, contractor, building department. The seal and its live verification page travel with the file.
You hold the live status. If a set is forged, altered, or submitted without your authorization, revoke it. If a matter needs a flag, annotate it — without touching the seal's validity.
Every scan, status change, and formal notice is logged. Export a tamper-evident evidence trail whenever you need to show exactly what was authorized, and when.
A plan reviewer, a contractor, a lender — anyone holding the document scans the QR or opens the link. No login, no app, nothing to install. They see the live status, your name and license, and can hash-check the file in their hand against the sealed original, right in the browser. Nothing is uploaded.
Found your seal on a forged drawing, an altered set, or a submission you never approved? Revoke it. The verification page flips to RED — NOT AUTHORIZED the instant you do, and a formal Notice of Revocation is generated, logged, and delivered to the parties on file. The document keeps circulating; what it proves does not.
The trust signal lives on a page you control, not on the paper — so copying the paper copies nothing that matters.
Seals are issued under a verified identity and license. A SealGuard seal points back to a real, accountable professional — not an anonymous image.
Each seal is tied to a SHA-256 of the exact sealed file. Change one byte and the in-browser hash check stops matching. Tampering shows.
A printed stamp is frozen the day it's made. A SealGuard seal reports its current status on every scan — authorized, on hold, revoked, or superseded.
Straightforward plans for solo professionals and firms. Revocations are unlimited on every plan.
An authority tool, not legal advice. SealGuard records and publishes the status you set for documents you have sealed. It does not replace your professional judgment, your licensing board's rules, or legal counsel. Payment and contract disputes are handled as informational annotations — never as a seal revocation.
The QR on it points to a live verification page that you control. Update the status and every future scan — by anyone, anywhere — reflects it immediately. The file in their hands doesn't change; what it proves does. Anything you seal through SealGuard is covered from the moment you seal it.
No. The verification page is public and needs no login, app, or install. Whoever scans the QR or opens the link sees the live status, your name and license, and can hash-check the file against the sealed original right in their browser. Nothing is uploaded.
When you seal a newer revision, the prior one is automatically marked SUPERSEDED, and its verification page links forward to the current set — so no one unknowingly relies on an outdated drawing.
A revocation is your professional statement that a document is not authorized — most often for a forged, altered, or unauthorized set. It is not legal advice, and SealGuard publishes only what you decide. Payment and contract disputes are handled separately, as a neutral informational annotation that asks the recipient to confirm with you — never as a seal revocation. For how any of this applies to your situation, consult your licensing board and counsel.
Bind a live, verifiable seal to every set you stamp — and shut down the ones that aren't yours.
Start protecting your seal →