Double meta refresh and single meta refresh

Is there any difference between using a double meta refresh and a single one? I thought both blank the referrer?

Yea, the whole point of the second one is to check if the referer from the first one is sent and if it is it then stops. Theres already tons of posts on how to check the referer so just do a quick search and your bound to find it. No point in posting the same code here.