If Affiliate wants to use several tracking systems to record data, he must add their corresponding Postback URLs into one offer. Once Affiliate gets tracking links, he needs to set it into the Fuseclick system and in return he has to send corresponding Postback URL to the system he wants to track.   
Once click happened, Affiliate system records this click and notifies FuseClick system, this click generates conversion and FuseClick calls the Postback URL.
If affiliate set both Global Postback URL and Postback URL for a specific offer than once click happened,  FuseClick system calls Offer Postback URL first.