At the moment there is no possibility of email confirmation (e.g. when a customer signs up, there is no email sent to the user that he can confirm the creation of the account or something like this).
So, for example: if a user inputs a typo to the email field his account is created with the wrong email address. For example the ‘password reset’ use case won’t work anymore for him, because he can’t receive the email (wrong email address was inputted).