If “Security Token” turns off in offer detail page, that means, network can used the Postback URL which without adv_sectkn. And can receive data from Advertiser System normally.
If “Security Token” turns on in offer detail page, that means, the 8 bit verification code should be added in Postback URL like below style: http://network.fusetracking.com/pb?tid={TID}&adv_sectkn=8 bit verification code; if the Postback URL does not have “&adv_sectkn=8 bit verification code”, the conversion will be recorded as Invalid.