I’m not going to go into why registering a customer number is important. I’m only going show the fastest way to create one and when to use it:
Go to Private Pair; Search in the page for “PAIR Administration” and expand that region; Select “Create New Customer Number” and “Continue”; Fill out the form; Select “Preview”; and Select “Submit”. Although the status will show “Submitted”, I was able to start using the new Customer Number right away.