When your client will mark album as finished, you will receive e-mail and you will be able to see notification about it in admin area.
By using links in notice you will be able to view album and filter what is selected and commented. Rest is up to you, to either contact client or move on with your work.
If you wish to disable sending e-mails about accepted albums, or change e-mail address to which they should be send, then you can do it in Appearance → Customize → Albums settings → Photo Proofing