Hello Smaaz, Last year i runned some campaigns on adwords had some invalid clicks and indeed i got my money back.
Hi Smaaz, With regard to invalid clicks, Google try’s to automatically filter them from reports and ensure that advertisers are not charged for those clicks - in other words they try to ensure that advertisers are not charged for those clicks in the first place. If however an advertiser is charged for invalid clicks in the previous two months, they will re-credit the advertisers' account. In billing section they will appear as "invalid activity" adjustments within your billing. If you are concern about Invalid Activity than fill this form. https://support.google.com/adwords/troubleshooter/2557048?hl=en&from=15950&rd=2 You can also read more about Invalid Clicks here: https://support.google.com/adwords/answer/2549113?hl=en