If an Admin user enrolls someone, and you have a Prepayment due at enrollment, you must manually add that Prepayment to the customer's account. Follow these steps to add that Prepayment.
Click here to learn how to set up a Prepayment on one or more Programs.
On a customer's Billing page, click on "Manage" under "Gift Cards & Prepayments."
Select "New record" then "Prepayment Record."
On the next screen, enter the amount then click "Submit."
The Prepayment record will appear in the "Gift Cards & Prepayments" under "History."
See this support article on how to add a Prepayment to an Invoice.