Profile Completeness reminder to the user Hi i need to send an mail reminder to the user whoever not been completed the profile information. Is there any module available  for this? or how do i do this? 

Can we do this using rules?
You could take a look at Profile Complete Percent (for core Profile module) Content Complete (if using Content Profile).

If you are using Content Profile, here is an article to assist setting up with Rules: Measure node completion in Drupal, part 3.  I'm sure you could probably get a Rules workflow going with core Profile module as well.