What Counts as a Referral?

The Conversion Log Entry includes the email address of the customer who performed the conversion (e.g. made a purchase). The customer's email address is used to distinguish regular conversions from referral conversions. If the customer’s recorded email address does not match the log entry’s email address, then a referral is inferred. The email address can be used to identify the customer making the purchase if the cookies are missing or expired.
Note: A customer can be wrongly credited with a referral if that customer has more than one email address.