Last cookie wins is the attribution rule, standard in most affiliate programmes, that when a user's journey involves more than one affiliate, the affiliate whose tracking cookie was set most recently before the conversion (within the cookie window) gets credited, and earlier affiliate touches get nothing.
Definition
Last cookie wins is the attribution rule, standard in most affiliate programmes, that when a user's journey involves more than one affiliate, the affiliate whose tracking cookie was set most recently before the conversion (within the cookie window) gets credited, and earlier affiliate touches get nothing. It is the affiliate-programme form of last-click attribution, and it defines the competitive dynamic between affiliates: whoever captures the final touch before registration is paid.
The rule is simple and unambiguous, which is why it is common, but it rewards partners positioned near conversion — coupon and "bonus code" sites, brand-bidding and comparison-interception traffic — over content that introduced and built trust in the operator earlier, and it is the mechanism behind many attribution disputes.
In context
For affiliates, understanding that last cookie wins is the default lets a content or comparison affiliate see clearly where it stands: it often does the work of introducing and recommending an operator, then a coupon site, a brand-bidding affiliate, or the operator's own retargeting captures the final cookie and the commission. Recognising this is the first step to addressing it commercially — negotiating a first-touch or assisted-conversion component, a longer or first-party cookie window, or a flat CPA that does not depend on winning the last touch, and getting the attribution rule and window confirmed in writing before running traffic.
It also frames why certain practices are contentious. Coupon interception, brand bidding and cookie-dropping tactics all work by grabbing the last cookie just before a conversion the user was already going to make, and last-cookie-wins is what makes them pay.
Programme terms that ban brand bidding and restrict coupon methods exist partly to limit this. For a content affiliate, the practical responses are deal structure and capturing the click closer to conversion with strong calls to action.
For affiliate-facing content, the framing is that last cookie wins credits the most recent affiliate touch before conversion and gives earlier touches nothing, that it is the affiliate-programme version of last-click attribution, that it disadvantages early-funnel content relative to interception tactics, and that the response is to confirm the rule and window in writing and negotiate deal terms that compensate the affiliate's actual role.
Worked example
A content affiliate ranks the review that first sells a player on an operator, but a coupon site sets the last cookie via a bonus-code page and, under last cookie wins, takes the commission. The affiliate confirms the rule and cookie window in writing with the programme and negotiates a first-touch assist payment plus a small revenue share so its demand-generating role is compensated.
Related terms
Frequently asked questions
Browse the full iGaming & affiliate glossary — hundreds of EN/RU terms with examples.
← Back to glossary