What is a billing authorization?
I think that this is authorization in your billing system, which also provides confirmation of your identity and connection to your account. This will give you the ability to bill your customers, who simply need to confirm the new bill and pay using their bank system or credit card.
For example, I use anesthesia billing at work, which helps me bill for used medications.
A billing authorization is a document in which a sponsor commits to pay designated educational expenses for you. The authorization from the sponsor specifies what they will pay, the period of coverage, and billing information. Sponsors usually send the authorization to us directly, but some sponsors send the authorization to the student. Third Party Billing does not notify the student or sponsor when authorization expires at the end of the term(s) or effective date(s). The sponsor and student are responsible to ensure that authorization is received before the first student bill due date to avoid late and installment/rebilling fees on sponsored charges.