MERCHANT PLAYBOOK · FREE PUBLIC ALPHA

Checkout evidence without another dashboard.

Keep the price, delivery, returns, and cancellation promise beside the payment record. OfferChecksum creates a public, tamper-evident receipt in under a minute—no account, call, or customer personal data.

Create a free receipt See the API and badge

The four-record checkout checklist.

01

Final offer

Preserve the item or service description, total amount, and the public page where the offer appeared.

02

Delivery promise

Record the minimum and maximum days, whether they are business or calendar days, and any important condition.

03

Returns promise

Record the return window, when it starts, who pays return shipping, and any restocking fee or condition.

04

Cancellation promise

Record how long cancellation remains available and the method or restriction that matters.

Why keep this beside the payment record?

Payment and order records establish important facts, but a later disagreement can turn on the surrounding offer. Shopify’s chargeback guidance lists records such as the product listing at purchase, return policy, itemized receipt, checkout confirmation, and policy terms accepted at checkout. WooCommerce’s evidence guidance likewise discusses receipts, policies, and evidence showing where a customer acknowledged the policy.

Platform guidance: Shopify chargeback process and WooCommerce evidence suggestions.

A useful minimum takes one minute.

  1. Enter the merchant name and final total.
  2. Add delivery, returns, and cancellation terms.
  3. Use a made-up test reference or a real non-personal order reference.
  4. Open the verification page and copy the badge HTML.

Never submit a customer name, email, postal address, card number, secret, or confidential information. Receipt pages are intentionally public.

What the checksum proves.

A verified receipt proves that its stored content still matches the content used to create its SHA-256 fingerprint. It does not prove authority, customer consent, performance of the promise, or legal admissibility. It is application evidence, not legal advice, a digital signature, or a qualified timestamp.

See exactly what the public record contains.

The fictional custom-order example shows a deposit, remaining-balance trigger, delivery range, return terms, and cancellation terms together—plus the limits of what verification can prove. It is clearly marked as an unissued example and creates no receipt.

Preview the fictional promise receipt →

Make the first receipt before changing your checkout.

Try the complete public flow with a made-up reference. If it fits, the API returns a verification URL and ready-to-use badge for the order page.

Create a free promise receipt