Recurring Payment Reminder email
You can do this by using Rules module.


  The Rules module allows site administrators to define conditionally
  executed actions based on occurring events (known as reactive or ECA
  rules). It's a replacement with more features for the trigger module
  in core and the successor of the Drupal 5 workflow-ng module.


How to Send Follow-Up Emails Using Rules Scheduler in Drupal 7 ?