Applicants receive a automated confirmation email when they first submit their application, but if it's sent back for revision, they do not receive an automated email to let them know that the revised form was submitted. We have gotten follow up calls/emails from almost every one of our applicants who were required to submit a revision because they are concerned that we didn't receive their updated form.
Similarly, there doesn't seem to be an automated email when requirement forms are submitted, which also leads to confusion for applicants.