Just like most shipping label software, you simply add money to your POP account to cover postage and the small per label fee, and you can start downloading and printing shipping labels right away.  You can add Pop Bucks to your account in increments as small as $50, which for most consultants will cover the postage and label for for 10 - 15 packages. 

You can read more about PopItUp Shipping labels on our blog: 

USPS Shipping Labels from PopItUp

Save Time and Money Using PopItUp Shipping Labels