Do advertisers get refunds for invalid clicks on search partner sites?
Yes. Google and Microsoft filter clicks they judge invalid, and advertisers are not charged for them. Clicks found invalid after billing are returned as credits on the account. The publisher side mirrors this: the same clicks are deducted from partner earnings. Advertisers who believe invalid clicks were missed can request an investigation from the platform.
In Google Ads, invalid-click columns can be added to reports to show how many clicks were filtered, and credits appear in billing as invalid activity adjustments. This is the advertiser's view of what publishers call a clawback.
The system has limits. Platforms decide what counts as an invalid click, disclose little about their reasoning, and cannot refund what they do not detect. A click from a real but misled person is valid by most definitions and will be billed. So filtering protects against the crudest click fraud, while weak-intent traffic has to be managed by the advertiser through exclusions, negative keywords and conversion-based bidding such as Target CPA.