code: def handle_expired_accounts():
      
      ACTIVATED = RegistrationProfile.ACTIVATED
      expiration_date = datetime.timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS)
      
      to_delete = []
      print "Processing %s registration profiles..." % str(RegistrationProfile.objects.all().count())
      for profile in RegistrationProfile.objects.all():
          # if registration profile is expired, deactive user.
          print "Processing %s" % profile.user
          # If profile has been activated already, set it to be removed
          # and move on to next registration profile
          if profile.activation_key == ACTIVATED:
              print "Found Active"
              to_delete.append(profile.pk)
              continue
              
          # If the user has not activated their account and the activation
          # days have passed, deactivate the user and send an email to user.
          if profile.user.is_active and profile.user.date_joined + expiration_date <= datetime.datetime.now():
              print "Found Expired"
              user = profile.user
              user.is_active = False
              
              # Send an email notifing user of there account becoming inactive.
              site = Site.objects.get_current()
              ctx_dict = { 'site': site, 
                           'activation_key': profile.activation_key}
                   
              subject = render_to_string(
                  'registration/email/emails/account_expired_subject.txt',
                  ctx_dict)
              subject = ''.join(subject.splitlines())
      
              message = render_to_string(
                  'registration/email/emails/account_expired.txt',
                  ctx_dict)
              user.email_user(subject, message, settings.DEFAULT_FROM_EMAIL)
              
              # Only save the user instance after the email is sent.
              user.save()
              
      # Delete the registration profiles that were set to be deleted, aka
      # user has already activated their account.
      print "Deleting %s registration profiles." % str(len(to_delete))
      RegistrationProfile.objects.filter(pk__in=to_delete).delete()
docs: Check of expired accounts.