First, i'd write to the site owner (depending if it is a real site, or just a scraper) and if that fails, go to the hosting provider.

I do it all the time, but in my case, they copy the page with the code, but the adverts never appear; just the code on screen.

My hosting provider says it is a non existing site yet my stats log has 450 impressions for the page. I have since taken the adsense ads off my original page and it publish to show no ads on the rogue site...

Help needed ... How do I get RID of the page that is linked to the original...

Is there a robot or mega tag I can insert?

Nope.

My hosting provider says it is a non existing site yet my stats log has 450 impressions for the page

Are you certain the problem isn't an originating bad link from another site, usually a blog? Quoting your page as something like:

www.example.com/firstpage.htm= [Note the = I appended]

I get heaps of those or similar AdSense or Analytics say they can't crawl.

Adsense tells me that I get one (just one) impression every single day from a handfull of domains that a) do not exist and b) have never existed. It also tells me I get one (just one) impression from two sites I owned but shut down 4+ years ago.

This is despite using an "approved" list that does not include these domains and a block of the domains themselves. In the end I don't think it impacts anything but at the same time it throws off all of the averages adsense reports in my control panel as you'd expect when they report more sites than I own. This might be a related bug.

I also noticed that. Channels that haven't been used un years still get 1 or 2 impressions per day.

@ElvisFan
Can you pm more details?

Channels that haven't been used un years still get 1 or 2 impressions per day.

That can happen if someone saves your page for offline browsing and when they display it in their browser, VOILA! you get an impression.

In some of my sites I have online chat services also embedded in the pages which allows me to see those pages come online as they use javascript just like AdSense does, so when one is engaged they're both functional.

If you want to see someone have a heart attack and close a page real quick, try forcing a live chat on them with a page they copied to their local hard disk, it's a scream! LOL!

After several weeks that page seems to have disappeared and my earning on that site page have doubled.