Affiliate Fraud
Manipulation of an online affiliate marketing programme to generate fake referrals, leads, or sales in order to earn illegitimate commissions.
Also known as: performance marketing fraud, affiliate marketing abuse
Last reviewed: 1 June 2026
Affiliate fraud occurs when individuals or organised groups exploit the commission-based structure of affiliate marketing programmes by generating artificial traffic, fake leads, or fraudulent purchases to claim commission payments they have not legitimately earned. Advertisers pay affiliates for driving genuine customer actions — sign-ups, purchases, app installs, or form completions — but fraudsters inject fabricated activity that mimics these actions.
Common affiliate fraud techniques include click farms (large banks of devices generating fake clicks), cookie stuffing (injecting affiliate tracking cookies onto users' browsers without their knowledge so the fraudster receives credit for any subsequent purchases), attribution hijacking (replacing legitimate affiliate tracking tags with fraudulent ones at the last moment), and coordinated fraudulent sign-ups using fake or stolen personal details to claim lead generation bounties.
Affiliate fraud costs brands and advertisers billions annually and distorts marketing analytics, making it difficult to optimise legitimate campaigns. Detection relies on traffic quality analysis, conversion rate monitoring, device fingerprinting, IP reputation scoring, and behavioural analytics that flag inhuman interaction patterns. Brands can reduce exposure by using vetted affiliate networks with fraud detection capabilities and by imposing conversion quality gates before paying commissions.
Examples
- An affiliate uses a botnet to generate thousands of fake ad clicks and cookie stuffs users' browsers so that any subsequent purchase from the retailer credits the fraudulent affiliate code, earning large commissions for zero genuine referrals.