A free checker for UK online sellers. Enter the advertised price, delivery and extra fees from your own listing, and see the all-in price a customer pays, stage by stage, with notes tied to the CMA’s 2 November 2026 open letter on including mandatory delivery fees in the total price.

Open the checker: https://volt-all-in-price-proof.pages.dev

This is an evidence and checklist tool, not legal advice. It describes what the letter asks retailers to show and leaves the judgement to you.

Joining also gives you access to the Volt community forum.