Originally Posted by jackal

I did some experimenting and realized that my settings in Chrome and Firefox to disallow third-party cookies was causing the failure.

I ensured all cookie options were turned on in IE (a browser I otherwise never use) and then proceeded to use IE for all TCB purchases. To date, I have not had a failure to track among 42 subsequent purchases. To anyone experiencing failures to track, I'd suggest ensuring third-party cookies are enabled. And if you've previously visited a site that you are then later purchasing on through a CB portal, based on some previous experience I've had with Commission Junction, it is often necessary to either delete a site's cookies or close the browser completely and relaunch it before clicking to a site through the portal to ensure the session cookies are removed and the site can properly set a cookie to track the CB portal referral. That's why using a different browser that you only use for CB purchases is often a good idea--in fact, I usually do all my research on hotels.com or Hotwire or whatever in Chrome, and then when I've found what I want to book, I open IE, use the TCB link, and enter the info to go straight to booking.

Originally Posted by MClab

I usually recommend a step or two further for convenience. Have a popular browser you do not use regularly assigned as your cash back browser. Keep it updated and clear all its browser cache and cookies before any cash back related shopping. Have any security/firewall/adware software enabled ignore that browser's use or temporarily disable security/firewall/adware software when making a cash back purchase.

A better option I've found is having a minimal virtual machine I use for cash back shopping purposes only. The VM is set by default to delete any system changes on close, so once I am done shopping I just shut it off and it goes back to the baseline I set up for shopping.