Usually, referral platforms rely on account creation, cookies, referral codes, or email matching to attribute purchases correctly. If the referred user logs into the same account across devices, the system can often recognize them and credit the referral. Problems happen when someone clears cookies, uses a different email, or checks out without logging in. Reviewing attribution logs, signup timestamps, and linked account activity helps identify where referrals succeed or break. These patterns help improve cross-device tracking, reduce missed commissions, and create a smoother referral experience.