We simply send an e-mail as "pre-notification of a payment", which is debited from the deposited customer account via SEPA. According to SEPA, this pre-notification is obligatory before the amount is charged.
The debit and the subsequent invoicing take place with an estimated delay of 10 days.
The invoice will be sent as a PDF by e-mail (as soon as the accounting has been carried out and we have received the money - this can take 1-2 days).
If the invoice is to be sent directly to a specific e-mail address, it can be stored in the Admin Interface -> Subscription -> Billing -> Billing e-mail address.
In addition, invoices can be viewed as an archive under Admin -> Subscription -> Billing -> Payment history at any time.