Your permission for pulling the consumer report comes from the fact the customer applied to do business with you. That right is not conditioned on your providing notice of your intent.
Posting the little signs is a courtesy and something of a time saver...sometimes the deadbeats see them and don't even bother to sit down.
Yes, I am a pirate...born 200 years too late. Some of it's magic and some of it's tragic, but I've had a good life all the way. JB