**Subject:** AdAttributionKit Postback URL Registration Questions for Existing SKAdNetwork Ad Networks

Here's a much shorter version with just the questions:

Hi Apple Developer Support,

We're an ad network already registered for SKAdNetwork and are integrating AdAttributionKit. We have a few questions regarding postback URL registration:

1. Do we need to register a separate postback URL for AdAttributionKit, or is our existing SKAdNetwork postback URL reused automatically?

2. If a separate AAK registration is required, can the AAK postback URL be the same as our existing SKAN postback URL, or does Apple require a different URL/path?

3. If the same URL is used for both, are AAK postbacks always delivered as a JWS payload while SKAN postbacks continue to use the existing JSON format?

4. When WWDC states that existing SKAdNetwork ad networks require "no further enrollment," does that refer only to reusing the existing ad network ID, or also to reusing the registered postback URL?

5. Is the Developer Mode AdAttributionKit testing flow the correct way to validate ad network postback delivery?

Thanks!