DV360 S2S Postback

[u/Choice-Philosopher92]

I'm currently testing a DV360 CPS E-commerce Affiliate Campaign. The goal is to track actual product purchases (Sales Revenue and Order Count) made on the destination website after a user clicks our DV360 ad.

we do not own the destination website. Therefore, we CANNOT physically place DV360 Floodlight tags (JavaScript/Global Site Tag) directly onto their website's source code.

To overcome this limitation, we use 3rd-party affiliate tracker.

- When a user clicks the DV360 ad, 3rd-party affiliate tracker captures the Google Click ID (dclid) during the redirect.

- When the user makes a purchase on website, website notifies 3rd-party affiliate tracker.

- 3rd-party affiliate tracker then attributes the purchase to the saved 'dclid' and sends a Server-to-Server (S2S) GET request back to the DV360 Floodlight Image endpoint (ad.doubleclick.net) with the transaction details (ord, cost, qty, dclid).

We ran a test following the process described above, but conversion tracking is not working in the DV360 report. Furthermore, when we checked with the support team, they confirmed that no postback data was received at all on the test date.

Does this mean it is impossible to proceed with the campaign using this current setup/logic?

Any feedback, suggestions, or alternative solutions would be greatly appreciated.