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What you are probably seeing
You see a disconnect in your dashboard where high click-through rates do not match the number of confirmed orders in your bank statement.
Your ad manager shows stalled learning phases because the system cannot confirm which specific users completed the transaction on the external site.
Why it happens
The browser sends the pixel request to your original domain, but the user is physically on a different third-party URL, causing the request to fail or get blocked by cross-origin policies.
Without a fired event at the moment of payment, the algorithm lacks the necessary feedback signal to distinguish between a prospect who abandoned the cart and a customer who bought.
What changed recently
Step by step
1. Identify whether your checkout process redirects users to a third-party payment processor or gateway.
2. Request a server-to-server webhook integration that sends payment confirmation data directly to your ad platform API.
3. Implement postback URLs on your third-party gateway to notify your tracking server when a transaction is finalized.
4. Map these external signals to specific user identifiers so the ad platform can match the purchase to the original click.
5. Review your ad manager’s attribution settings to ensure these new off-domain events are counted as conversions.
Ways to go further
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