Cookie stuffing forces tracking cookies onto a browser without a click. Fraudsters use hidden iframes or scripts to drop cookies for multiple merchants. The goal is to claim credit for organic purchases the user was already planning to make, stealing commissions from the brand.
Networks detect this by analyzing Click-to-Conversion Time (CTCT). A natural purchase has a gap between the click and the sale. If conversions happen instantly after an invisible "click," it is a red flag. High conversion rates with zero page engagement are another clear indicator of fraud.
Modern tracking monitors for missing referrer data. If a cookie is set without a user-initiated event, it signals automated stuffing. Systems now verify that the user actually interacted with the creative before tracking code fires.
Audit your traffic sources and avoid scripts that interfere with the user journey. Profit comes from genuine intent rather than manipulating attribution.
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Why cookie stuffing remains the most persistent form of affiliate attribution fraud
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