---
title: How Class Manager knows which Customer need to be invoiced
description: Understanding the process of invoicing for enrolled students
---

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1. [Classic Class Manager Knowledge Base](https://help.classmanager.com/?hsLang=en)
2. [Invoices](https://help.classmanager.com/invoices?hsLang=en)

# How Class Manager knows which Customer need to be invoiced

## Understanding the process of invoicing for enrolled students

When you add a customer, or when a customer signs up through the portal on Class Manager, either you or the customer must enrol their student in a class.

Once a student has been enrolled in a scheduled class, the system recognizes that they need to be invoiced. This could occur in two ways:  
a) If you, as the admin, have manually enrolled the student into the class, or  
b) If the customer has enrolled through the online enrollment portal (if enabled).

If an invoice has already been created for a customer for that particular class, Class Manager will recognise that they have been billed and will not generate another invoice for the same class.

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