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When they line up, challenge the checkout so a real buyer can clear it before the charge clears.",[212,300,302],{"id":301},"related","Related",[304,305,306,316],"ul",{},[307,308,309,311,312,315],"li",{},[220,310,64],{"href":65},": the same signals on the ",[224,313,314],{},"login"," action.",[307,317,318,320],{},[220,319,177],{"href":178},": the VPN, proxy, and Tor checks behind this policy.",{"title":322,"searchDepth":323,"depth":323,"links":324},"",2,[325,326,327],{"id":214,"depth":323,"text":215},{"id":230,"depth":323,"text":231},{"id":301,"depth":323,"text":302},"md",{},true,"---\ntitle: Risky transaction prevention\n---\n\n# Risky transaction prevention\n\nAdd friction to high-risk checkouts before the charge goes through.\n\n## Step 1: Protect the checkout\n\nBefore anything else, make sure you have a working integration by following the [Quick start](\u002Fdocs\u002Fv3\u002Fquick-start). A dedicated transaction action is coming soon. Until then, protect the checkout surface as an `access` evaluation: evaluate when the user reaches checkout.\n\n## Step 2: Add the policies\n\nA policy has a trigger (the event it runs on) and a verdict. Add these in your [policies dashboard](https:\u002F\u002Fapp.rupt.dev\u002Fpolicies):\n\n| Policy                  | Trigger  | Conditions                                                        | Verdict    |\n| ----------------------- | -------- | ----------------------------------------------------------------- | --------- |\n| Challenge risky checkouts | `access` | `is_new_fingerprint`, `ip_is_vpn`, `impossible_travel`, or `is_new_ip` | Challenge |\n\nThese are the same signals as an account takeover, applied to a purchase instead of a login: a device you've never seen, a VPN, a location the account couldn't have reached, a network it has never used. When they line up, challenge the checkout so a real buyer can clear it before the charge clears.\n\n## Related\n\n- [Account takeover prevention](\u002Fdocs\u002Fv3\u002Fguides\u002Faccount-takeover-prevention): the same signals on the `login` action.\n- [Anonymizing network](\u002Fdocs\u002Fv3\u002Fconcepts\u002Fanonymizing-network): the VPN, proxy, and Tor checks behind this policy.\n",{"title":68,"description":210},"6oy79TgeLv6ZdvzgXJZThwjiZ_cH5katund_qlqoBjA",1780344893048]