How to Track Affiliate Conversions Across Traffic Sources
Affiliate conversion tracking is strongest when every paid or promotional click carries a campaign identifier that can be returned with the conversion.
Give each campaign a durable ID
Use a consistent parameter or tracker identifier that survives from traffic source to affiliate network where permitted.
Use postbacks or APIs where available
Server-to-server callbacks can return conversion information without relying exclusively on a thank-you page you do not control.
Reconcile network status
Pending, approved, refunded, rejected, and reversed conversions should not all be treated as final revenue.
Compare click and conversion time
Some affiliate sales occur well after the click. Use an evaluation window that reflects the offer's buying cycle.