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OpsMar 13, 2026

Affiliate tracking: cookie vs coupon vs email domain matching

A simple way to choose an attribution method that you can explain during payouts

Cookie vs coupon affiliate tracking

If you’re choosing affiliate tracking for a SaaS program, the hard part is not tracking a click. The hard part is choosing a rule you can defend when payouts happen.

This guide breaks down affiliate tracking cookie vs coupon (plus email domain matching): what each method is good for, what breaks first, and a simple default you can copy/paste.

Table of contents

Definition and when it matters

Attribution is the rule that decides who gets credit for a conversion. If the rule is unclear, you will see disputes during payouts.

Options and tradeoffs

Best when you want clean tracking without discounts. Breaks when users switch devices or block cookies.

Coupon attribution

Best for creators who need a code. Breaks when coupons leak to deal sites and you pay for customers you would have gotten anyway.

Email domain matching

Useful in B2B when partners refer companies and you want a second signal. Breaks when people sign up with personal emails first.

  • Use link attribution as the primary rule
  • Allow coupons only for named partners
  • If you add domain matching, treat it as a manual review signal

Copy/paste templates

Template: coupon fallback

Coupon fallback: If a coupon code is used, we attribute the conversion to the coupon owner unless a different affiliate link click happened within the last 24 hours.

FAQ

Should I use coupons from day one?

Only if your partners require them. Coupons are powerful, but leakage is real.

Final takeaway and next step

Next step today: write your rules in one page, then test with a small pilot before you scale.

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