O/COfferChecksum
IntegrateCapture an offerMake a receipt ↘

THE RECEIPT BEFORE THE RECEIPT

A checksum for
what was promised.

Item. Price. Delivery. Returns. Cancellation. Turn the offer a customer accepted into a public, tamper-evident promise receipt.

Create one free Check what is missing See how it works
NO CUSTOMER ACCOUNTNO PERSONAL DATAPUBLIC VERIFICATIONSHA-256 CHECKSUM

THE GAP

A normal order receipt proves payment. It rarely proves the full offer.

Product pages change. Delivery estimates disappear. Return terms move. When a dispute starts, both sides reconstruct what the checkout promised from screenshots and memory.

OfferChecksum records a small, structured snapshot at the moment of agreement and gives it a fingerprint anyone can recheck later.

01

State the promise

Record the commercial terms in a fixed, readable format.

02

Seal the receipt

The server timestamps and fingerprints the exact canonical record.

03

Verify it later

A permanent public page recalculates the checksum on every view.

THE BUILT-IN LOOP

A badge that earns its next user.

Put the verified badge beside an order confirmation or checkout summary. Customers can verify the promise; merchants who encounter it can create their own receipt.

View the integration guide Capture a live offer page first → Ask a seller for a receipt → Check an order for unwritten promises →
✓OfferChecksumVerified promise

Every badge links to a live receipt. Every receipt links back to the free generator.

EVIDENCE NOTE 01

What an order receipt fails to preserve.

Payment records are useful, but disputes can also turn on the product description, final amount, delivery expectation, and policies accepted at checkout.

Read the evidence note Use the merchant checkout checklist → Preview a fictional promise receipt → Preserve a preorder promise → Seal a deposit and remaining balance → Check the deposit split and wording → Copy a blank custom-order terms template → Check rush-order fee and deadline terms → Build a written seller request → Find the promise gaps →

FREE ALPHA · NO ACCOUNT

Make a promise receipt.

This free alpha creates a public verification page only after you seal the form. Review each promise, use a made-up reference, and never enter a name, email, address, card number, or other personal data.

Checking required answers… Nothing is stored until you seal.

Start with the seller and final price.

OPTIONAL · SELLER-CONTROLLED

Fill a few explicit choices with one click.

Use a shortcut only when it is exactly what you promise. Nothing is selected automatically, and every filled value remains editable before you seal.

Seller and price
Deposit or split payment optional — open if used

If used, the two amounts must add up to the total price. State refund conditions under cancellation.

Delivery promise
Return promise
Cancellation promise

THE OUTPUT · BEFORE YOU COMMIT

Seal once. Get a link anyone can recheck.

  • Exact public record: the commercial wording above, a UTC timestamp, and a SHA-256 fingerprint.
  • Useful handoff: a public verification URL plus badge HTML for an order page or confirmation.
  • Visible limits: verification proves record integrity—not identity, consent, payment, fairness, or performance.

No account is created. Review the private preview first and remove every customer name, email, address, private link, card detail, or secret.

Public record: by creating this receipt you confirm it contains no personal or confidential information.

BUILT TO STAY SMALL

Not another dashboard demanding attention.

One job: preserve the offer that was accepted. The eventual paid service keeps verification pages live, exports dispute-ready records, and integrates with checkout systems.

£9/month
500 receipts£29/month
5,000 receipts + exports