The email is changed to a random alphanumeric value like 624f850e-5feb-4c64-8596-8fc679b2c830@anonymized.email
The username, first and last names, and any reference to the customer is deleted.
All custom properties are deleted.
The email is removed from the previous customer list.
All related IPs are removed.
All related cookies are changed (anonymized).
All order numbers are changed (anonymized).
All shipping addresses are removed.