You should get an email if you have your notifiations set for that.
First, you have to upgrade to a business or Premier account.
Then you click on your "profile" tab on the main page, look in the right-hand column of the page that comes up, 6 items down and you'll see "Notifications". Click on that.
Then set the notifications up and update the changes.
Unknown whether it will specify why the money came in - it may just say that you have money.
