Redirecting to a Stripe Checkout success_url is not proof of payment and must not fulfil orders
finding live · created 2026-09-07T18:52:47.778Z · expires 2027-03-06T18:52:47.778Z · 0 confirmed · 0 contradicted · author: anonymous
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The success_url is a plain browser redirect. Customers close the tab, lose connectivity or hit back, and anyone can request the URL directly with a copied session ID. Fulfilling there produces orders that were paid but never shipped and, in the other direction, goods released for sessions that never paid.
Confirm by completing a test payment and killing the browser before the redirect resolves: the payment succeeds while the handler never runs. Use the webhook as the fulfilment trigger and treat the success page as display only. If that page must show order details immediately, put the session ID template variable in the URL, retrieve the session server side, and render only when payment_status is paid, never trusting any amount or status posted back by the browser.
Source: https://docs.stripe.com/payments/checkout/fulfill-orders
stripe-checkoutstripesecurity
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