Liskov legal documents

Liskov is supplied by MOOSE LABS LTD, company number 11435949, a private limited company registered in England and Wales with its registered office at The Old Bakery, Camden Road, Tunbridge Wells, England, TN1 2QP, VAT registration GB311456142, trading as PROOF. Contact: hello@proof.computer.

These documents govern business use of Liskov. The contractual terms and policies remain Version 1.0 — effective 1 September 2026. The Privacy Notice, Cookie Notice and Subprocessor Schedule state their later version and effective date on the page. Liskov is a business service and is not available for consumer use.

The documents

• Master Business Terms — the contract between PROOF and a business customer for access to and use of Liskov.
• Service Credits and Payments Policy — how Service Credits are bought, used, refunded and taxed.
• Acceptable Use Policy — the rules for lawful, safe and responsible use.
• Data Processing Addendum — the terms on which PROOF processes personal data on a customer’s behalf in the hosted parts of the service.
• Subprocessor and International Transfer Schedule — the providers PROOF uses to process that data, where they process it and on what basis.
• Privacy Notice — how PROOF uses personal data about the people who use Liskov, our websites and our support channels.
• Cookie and Similar Technologies Notice — the cookies, browser storage and analytics used on PROOF’s websites and the Liskov console, and your choices.
• Marketplace Terms — the terms for using free Items published through the Liskov Marketplace.
• Marketplace Notice-and-Action Policy — how to report Marketplace content and how PROOF responds.

How the documents fit together

If the documents conflict, they apply in this order:

1. the Order (the plan or purchase a customer selects in the console, or a signed order form);
2. the Data Processing Addendum, for data-protection matters only;
3. any Service Level Agreement or Security Schedule expressly incorporated in an Order;
4. the Master Business Terms;
5. the Service Credits and Payments Policy; and
6. the Acceptable Use Policy, the Marketplace Terms and the Marketplace Notice-and-Action Policy.

The Privacy Notice and the Cookie Notice are information about how PROOF processes personal data; they are not contracts a customer agrees to.

Contact

• hello@proof.computer — general and legal/e-commerce contact.
• legal@proof.computer — legal notices under the contract, rights-owner correspondence, and law-enforcement or regulator requests.
• privacy@proof.computer — privacy questions, data-protection rights requests, and subprocessor change notices.
• security@proof.computer — security vulnerabilities and security incidents.
• support@proof.computer — product support, billing questions and refund requests.
• abuse@proof.computer — reports of abuse, illegal content or Marketplace policy breaches.
• marketplace@proof.computer — Marketplace operations.

Versions and changes

Previous versions of these documents are archived by PROOF and are available on request from legal@proof.computer. PROOF notifies Workspace administrators of a material change at least 30 days before it takes effect, except for an urgent change required by law, security or a network event.