How many referrers can they see?

Heya folks,

I tried search but couldn't get an exact answer. I see some people advocating "double blanking" of referral logs. I guess this means that any CPA offer can track back the two previous domains a lead visited, or is there a different reason/meaning to that?

Also, do CPA programs look at all the browser header info sent to the site?

Thanks!

The referer is one single variable containing the site that was linking to the destination.
What you mean is a double meta refresh, a technique to remove a referer variable.

So: they can not track your previous sites, only the last site that was linking to them.
And they look at this for sure

Check this out. Might give you an idea on how to clear the referrer.

hxxp://www.c0ntentgeneration.org/how-to-fake-a-browser-referrer-for-blackhat-cpa/