I understand that the registration to the site must

I understand that the registration to the site must be completed so the payment can be tied to an existing user. For those individuals who sign up but do not pay (essentially become a user but have no member privileges) is there a way to send them an email informing them that they did not complete the membership sign up? I’m looking for something more automated than manually emailing each user that did not pay.

Thank you for any assistance.