The introduction of Google Analytics 4 (GA4) has significantly changed how channel attribution is measured compared to its predecessor, Universal Analytics (UA). The key difference between the two analytics systems is the transition from the last click model found in UA to the data-driven attribution (DDA) model set in GA4 by default. This results in a larger discrepancy in reported numbers between affiliate tracking providers and GA4. This article will explore how GA4 and affiliate tracking platforms can be utilised together, key considerations for mitigating differences in attribution, and why following best practice in this area will ensure continual success of affiliate partnerships.