For AI agents: the complete documentation index is available at https://docs.clickmax.io/en/llms.txt, the full documentation bundle is available at https://docs.clickmax.io/en/llms-full.txt, and this page is available as Markdown at https://docs.clickmax.io/en/faq/payments/how-one-click-buy-works.md.
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      • How does One Click Buy work in ClickMax?

      When the funnel has an upsell or downsell step after the main purchase, ClickMax reuses the payment details of the already-authenticated customer. On those offers they see only a button to confirm the new purchase, with no need to fill in the checkout again.

      If it didn't work

      • The confirmation button only appears on the funnel's upsell/downsell steps; review how the funnel is built in Create funnels.
      • Check the seller registration so the charge can be processed, in Seller registration.
      • Errors when confirming the purchase: see the error codes.