Billing Overview

The Billing menu manages invoices for subscribers: documents that show what a subscriber bought and whether it is paid. Invoices can be printed or sent as PDF.
User invoices are documents for your subscribers. They don't move money between balances. Manager balances, deposits and commissions are in the Managers chapter, and manager invoices are in Reports → Managers Invoices.
Where invoices come from
How it is created
Type shown
Paid?
Billing → Issue Invoice (manual)
custom
Unpaid
Activation with Manager Balance and Issue an invoice for the user ticked
acp_activation
Paid if Money Collected is ON, otherwise unpaid
Activation or extension paid from the user's balance, or by the subscriber in the user portal
activate
Paid
Automatic invoice for Postpaid profiles
purchase/postpaid
Unpaid
Withdrawal from a user's balance
transfer/withdrawal
Paid
Pages in this chapter
User Invoices: list, pay, un-pay and download invoices.
Issuing an Invoice: create an invoice manually.
Invoice Designer: change the invoice PDF layout and logo.
Postpaid Billing and Settings: automatic invoices for postpaid users.
Invoice number
Invoice numbers look like 
2026-5-1234: year, ID of the manager who created the invoice (0 = created automatically), and a running number.