How to detect affiliate fraud in Stripe-based SaaS programs before it scales

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Affiliate fraud in small SaaS programs typically takes two forms: self-referrals where affiliates buy through their own links to earn commissions, and coupon leaks where discount codes spread to deal sites and convert customers who were already intending to purchase. Stripe's card fingerprint feature offers a reliable way to detect self-referrals, since the same physical card produces the same fingerprint even across different customer accounts. Coupon leaks can be identified when an affiliate's redemption count far exceeds their actual click traffic, suggesting the code is circulating independently online. A third abuse pattern involves affiliates inflating click counts via hidden iframes to claim commissions on organic conversions, detectable by logging referrer headers and user agents. Experts advise against auto-rejecting flagged commissions, recommending instead a manual review process with a 30-day hold window to avoid penalising legitimate affiliates.

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