The flow for Manual Gateway is fairly simple and requires little effort from the admin. You can manage it all from your Subscriptions panel. Here’s how it works:
When users who selected manual payments reach the end of their subscription time, the subscription will be marked as On Hold for the period you select on the Manual Gateway options.
In the subscription page you can find all the subscriptions details
A pending payment transaction is added to his Billing History.
The little flag indicates a pending payment
An invoice is sent to the email address provided during signup, with the instructions to pay it.
Once you confirm the payment, you can mark the pending payment as paid.
After that, the subscription will be renewed automatically.