Affiliate Postback Tracking (S2S): Plain-English Guide
Postback tracking is a server-to-server method that sends conversion information from one platform to another using a unique click or transaction identifier. It is widely used in affiliate marketing because the affiliate often cannot place a conversion pixel on the merchant’s checkout.
Key takeaways
- A click ID must survive from the original click to the conversion record.
- Macros and parameter names must match the network’s documentation exactly.
- Test one conversion through the entire chain before scaling traffic.
- Keep a postback log when the platform provides one.
A plain-English example
Your tracker creates click ID abc123. The affiliate network receives that ID in a supported parameter. A customer buys. The network calls your postback URL and returns abc123 plus the conversion information. Your tracker can now connect the sale to the original click.
Postback vs pixel tracking
A pixel typically depends on a page loading in the browser. A postback is a server request. Neither is automatically superior in every implementation, but postbacks are especially helpful when you do not control the conversion page.
Testing checklist
- Confirm the network receives the click ID.
- Confirm the conversion contains the same ID.
- Confirm the postback endpoint returns a successful response.
- Confirm revenue and event type are mapped correctly.