Let’s Seal

Seal and verify HR & corporate documents

Employment contracts, references, payslips, and board minutes that carry their own proof — so a new employer, a lender, or a shareholder can confirm a document is genuine, and forged payslips and fake references fail on sight.

For hr teams, company secretaries, boards, and startups.

Open the app Developer docs
What a seal proves

Four guarantees, in hr & corporate

A payslip or reference that can't be faked

A changed salary, title, or date fails verification. The forged-payslip and fabricated-reference problem, closed at the source.

The issuing company, named

Every letter, payslip, and minute names the company that sealed it, chaining to a published root — provable issuer, not a copied letterhead.

Fixed at the moment of issue

The issue date is timestamped on Bitcoin — useful for start dates, notice periods, and the record of a board decision.

Verified without a call to HR

A new employer, a lender, or a shareholder confirms a document at a permalink — instantly, and free.

How it works

From your file to a proof anyone can check

The same pipeline every time — the seal and the timestamp travel with the file, so the proof is self-contained.

Your file
Your signed PDF
Seal
Signed over every byte · PAdES
Anchor
Bitcoin timestamp + public transparency log
Proof page
A permanent /d/… link travels with the file
Anyone verifies
Free, public, offline-capable — for anyone
The proof travels inside the file. Verification stands on the published root, the transparency log, and the Bitcoin ledger — so a court, a bank, or a counterparty can check it independently, forever.
Step by step · the web app

Seal it in the app — no setup

  1. 1

    Sign in as your company

    Open app.letsseal.org and sign in. Your organisation gets its own certificate authority the first time you seal.

  2. 2

    Upload or generate the document

    Drop in the contract, reference, or payslip. It's sealed with your certificate over the whole file, so any later edit is caught.

  3. 3

    Anchored and logged automatically

    The fingerprint is timestamped on Bitcoin and written to the public transparency log. The recipient gets a normal PDF that also verifies.

  4. 4

    Deliver with a proof link

    Every document has a permanent proof page. The employee shares the link; a new employer or lender opens it to confirm the document is genuine.

Step by step · the CLI

Automate it from your terminal or CI

The sealbot CLI does the same thing, scriptably — one command per file, straight into your pipeline.

# Seal every payslip in a run as it's generated
$ sealbot watch /srv/payslips --mode seal --org examples
watching /srv/payslips … sealing new & changed PDFs (idempotent)

# Seal a single reference letter under your company
$ sealbot seal reference-letter.pdf --org examples
sealed   reference-letter.pdf
  proof  https://letsseal.org/d/4d61af…8b70

# A new employer confirms a reference — public, no account
$ sealbot verify reference-letter.pdf
✓ authentic · unaltered · sealed by Let's Seal Examples

Point a watched folder or your HR/payroll system at Let's Seal and every payslip and letter leaves already sealed, timestamped, and carrying a proof link — one command per document, no per-seal fee.

Full CLI & API reference
See it in action

What a proof looks like, and what you can seal

Issuer verified — controls letsseal.org
Authentic & unaltered
Document
A sealed payslip
Issuer
Let’s Seal Examplesletsseal.org
SHA-256
64-hex fingerprint ✓

Anchored on Bitcoin

Recorded in the public transparency log

Public and free to verify — by anyone, with standard tools.
Open the live proof

A single use case, many documents. Each of these is sealed the same way:

  • A sealed payslip

    Live proof

    Open the proof page the way a lender or letting agent would: it shows the payslip is authentic, unaltered, issued by the named employer, and timestamped — the fake-payslip problem, solved.

  • An employment reference or offer letter

    Seal references and offers so a new employer can confirm the letter is genuinely from the issuing company, unaltered — no phone call to HR required.

  • An employment contract

    Seal the executed contract so both parties can prove the terms are exactly as agreed, and which version was signed.

  • Board minutes or a share certificate

    Corporate records sealed and timestamped, so a shareholder, investor, or registrar can verify a resolution or certificate is genuine and dated.

Live proofs are real documents sealed under the “Let’s Seal Examples” organisation.

Common documents

What you’ll seal

  • Employment contracts
  • Offer & reference letters
  • Payslips & P60s
  • Board minutes & resolutions
  • Share certificates
  • Right-to-work documents
Questions

Straight answers

Does this stop fake payslips and references?
A sealed payslip or reference can't be edited without failing verification, and the recipient can check it against the proof link. A fabricated or altered document simply won't verify as issued by the company.
How does a new employer verify a reference?
They open the proof link, or drop the PDF into the public verifier. It confirms the document is genuine, unaltered, and issued by the named company — with no call to your HR team.
Can I seal a whole payroll run at once?
Yes. Point the CLI or a watched folder at your payroll output and every payslip leaves sealed, timestamped, and carrying a proof link — one command per file, no per-seal fee.
Does the recipient need special software?
No. They get a normal PDF that opens anywhere, and it also verifies against the public portal and any standard PAdES validator.

Start sealing hr & corporate documents

Free and open. Seal in the app, automate from the CLI, and hand anyone a proof they can verify themselves.

Open the app All use cases