Forum Moderators: martinibuster
It could also be invalid clicks deducted subsequently.
I once had a large sum deducted from my reported earnings at payment time for that reason. (I knew it was because of invalid clicks because I'd reported the clickbot attack a few weeks earlier.)
I do wish AdSense would correct the earnings report (not just the payment amount) when earnings from invalid clicks are deducted, just to allow accurate month-to-month comparisons of earnings.