Prove every document
is real.
Cryptographic document authentication for purchase orders, invoices, wire instructions, and contracts. Browser-based. Nothing leaves your environment. Provenance for the documents that move money.
Three steps.
All in your browser.
Upload, sign, verify. Every operation happens client-side. No documents are transmitted to SureMark servers — ever.
Drop in Your PDF
Open the SureDoc™ web platform and drop in any PDF — a purchase order, invoice, contract, or wire instruction. The file never leaves your browser.
Sign with Your Credential
The credential holder digitally signs the document with their SureMark credential. The signature binds identity to content cryptographically.
Recipients Confirm
Anyone can drop the signed document into the verification platform to confirm authorship — instantly, in their own browser, no account required.
purchase-order-2026-Q2-1847.pdf
Documents that move money or matter legally.
SureDoc™ stops financial fraud at its source. Purpose-built for the document types where forgery is most damaging — and where authentication is most often skipped because it's too slow.
Purchase Orders
Stop fraudulent POs from triggering supplier fulfillment. Provenance baked into every authorized order.
Invoices
Recipients confirm an invoice came from the real vendor before paying — eliminating invoice redirection fraud.
Wire Instructions
The single highest-fraud document category. SureDoc™ credentials make spoofed wire instructions instantly detectable.
Legal Contracts
Cryptographic proof of who issued and signed every contract — non-repudiable, audit-ready, court-defensible.
Official Documents
Government correspondence, board resolutions, official statements — proven to come from the real issuer.
Approval Records
Internal authorizations, sign-offs, and decisions get an unforgeable audit trail tied to the actual approver.
Your documents stay yours.
Every operation happens in the browser. SureMark never sees your documents.
Most "secure document" platforms require uploading your sensitive contracts to a vendor's cloud. SureDoc™ doesn't. Signing and verification both run client-side in JavaScript. Your purchase orders, wire instructions, and legal contracts never touch a SureMark server. Compliance teams love it. Air-gapped environments support it. Legal counsel signs off on it.
SureCircle™ Identity Assurance + SureDoc™ =
complete enterprise protection.
In a world where images, videos, and documents are all easily forgeable, you need provenance for both the people communicating and the artifacts they're sharing. SureCircle™ Identity Assurance and SureDoc™ are designed to work together.
Verifies the person
Cryptographic proof that the human on the other end of the call is real — before they ask for the wire.
Verifies the document
Cryptographic proof that the PO, invoice, or contract came from the actual issuer — before you act on it.
Co-creator of blockchain
Make every document provably real.
See SureDoc™ in a 30-minute live demo. We'll sign and verify a real document together — entirely in your browser.
Schedule a Demo →