Maxbounty callback URLs

I'm not sure if I'm posting this to the right forum. I'm stuck with Maxbounty callback URLs and need help.

In its help section Maxbounty shows an example on how to send callbacks to a third-party server script.

Here is the help page:
http://maxbounty.com/help.cfm?id=12

And here is the actual example:

Now my question is regarding the hashtag sign (#). CGI and PHP won't read anything after the # sign. In my view the correct callback URL would be as follows:


This should work, but not the first one. Or maybe I'm wrong and missing something. I'm not inclined to think Maxbounty staff missed the obvious thing.

So need your help please.

I hope you will do it well.
I still don't know How do I get approval from MaxBounty