A postback (server to server tracking) works like this: your link carries a click identifier, the programme stores it, and when the player signs up or makes a first deposit, the programme’s server calls your URL and sends that identifier back.
That lets the affiliate see in their tracker which campaign, ad or page brought the FTD, without relying on browser cookies. For paid traffic it is the basis of optimisation.
What to check
- Whether the programme’s platform supports postbacks and for which events.
- Whether the postback also sends the deposit amount or only the event.
- Whether postbacks are also sent for players who later fail verification.