'Given an email, look up user by email and resend activation key if user
is not already activated or previous activation key has not expired.
Returns True if activation key was successfully sent, False otherwise.'

def resend_activation(self, form):

    site = get_current_site(self.request)
    email = form.cleaned_data['email']
    return self.registration_profile.objects.resend_activation_mail(email, site, self.request)
