Linesman stops bot checkouts and card testing at the payment step, then finds and deletes the fake customer accounts bots leave behind. You start in Watch mode: it records what it would block and checks it against your real orders first. The checkout guard covers Shop Pay and express checkout, returning customers always pass, and Attack mode tightens checks during an attack. Delete bot customers after a backup and suppress them in Klaviyo. No redirects, block pages or theme code edits.

• Stops card testing at the payment step, including Shop Pay and express checkout.
• Watch mode shows what it would block before you turn blocking on
• Returning customers and your allow list always pass
• Attack mode tightens checks automatically during an attack, then relaxes
• Find and delete fake customer accounts and suppress them in Klaviyo