There are only two possible ways to purchase pages for Cloud OCR SDK:
1) for standard volumes payment is performed via the PayPal system. This purchase procedure is fully automated. If you do not have the PayPal account, you will have a possibility to create it in the opened page during the payment procedure. Please see Online Purchase Guide for details.
In this case you can get the PDF invoice for every your purchase to your email if you enable the "Send PDF invoices for every completed purchase" option in the Invoice settings of your Account Settings.
2) for contractual cases (more than 100 000 pages for the period of time) you can contact your region sales manager to discuss more convenient conditions of using our service. For this press Contact sales at the Plans and Pricing web page and fill the corresponding form.