Don’t worry about accidental Adsense click
Accident happens… Google Adsense team wrote an article to calm webmasters fearing the safety of their account due to accidental click on their Adsense; and they advised against contacting them if it occurs…
As most of you know, our program policies state that publishers are not permitted to click on their own ads for any reason. For this reason, we’ve received many emails from publishers letting us know that they’ve accidentally clicked on their own ads. If you’re one of these publishers, we truly appreciate the efforts you’ve made to monitor your account and keep it in good standing. However, we do understand that an accidental click may occur from time to time, so there’s no need to contact us each instance this occurs.