To make the recurring billing more strict and safe, we recommend that you consider imposing some restrictions before you start processing payments recurrently.
To configure the recurring payments processing:
If there are some payments or credit adjustments with positive balance and auto-pay allowed, then without respect to 'apply-changes' setting, appropriate Invoice will be issued and paid and services will be provided.
Note: Partial payment of orders using an account positive balance is also possible. If an order total amount exceeds an account positive balance, then an order will be paid in part and a customer will be prompted about the remaining amount to pay.
If there are no payments or credit adjustments with positive balance exist for a given Account, and auto-pay is allowed at the same time, then the 'apply-changes' setting (see point c above) is being checked. If it is set to 'Immediately' then a subscription will be created, and an open Invoice (to be paid in due period) will be issued for this Account. If 'Apply-changes' is set to 'After payment received', then an open Order (to be paid in validity period) will be issued, and a subscription will be created only after an Order is paid.