Google click tracking system

When sometime I check my account it shows $50 then after 30 min it shows $45

is there such a system like fraud/multiple ip clicks system implemented in google so that is why they refund the money back to the advertisers?

thanks.

i would say that is good as long they don’t ban our account lol

Yes. Of course there is.

so you had experience like that? when it shows $50 but next hour shows $40?

No, because I’d never check AdSense twice in an hour. On the AdWords side I’ve had >10% of my spending refunded for invalid clicks many months.

Read this for the explanation:
Google AdSense Daily Earnings Changes Reporting Pipeline

Thanks for the info. I think is great to have this kind of system in place instead banning publishers account.