---
title: "Reversing Customer Invoices"
slug: "reversing-customer-invoices"
description: "Learn about Reversing Customer Invoices in Marlin Tyre and Mechanical Workshop Software by Megabus."
updated: 2026-04-30T04:57:24Z
published: 2026-04-30T04:57:24Z
canonical: "help.megabus.com.au/reversing-customer-invoices"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.megabus.com.au/llms.txt
> Use this file to discover all available pages before exploring further.

# Reversing Customer Invoices

**Marlin Tyre and Mechanical Workshop Software** enables customer invoices to be reversed using credit notes.

Credit notes replicate the original job and customer details with **reversed values**.

The credit can then be allocated against the original invoice using a **zero-value customer payment**.

## Reversing Customer Invoices

#### Daily Activity > Customer Orders

Entire customer invoices can be easily reversed by selecting the relevant order from the Customer Orders Search list and clicking the **Clone** button at the top-right of the Customer Orders window.

Tip

By default the customer order list will display only open customer orders. To view completed orders, change the filter dropdown to the top right from Current to Closed.

The **Select Customer Order Type** pop-up window will open showing a list of customer order types that can be created.

Select **Credit Note** and click on the **Select** button at the bottom right of the pop-up window.

A credit note with the same customer and job information, but reversed detail values of the original customer order will automatically be created.

Click on the **Information** tab at the top of the module window.

At the bottom of the **Order Information** section on the left, use the **Credit Note Reason** picker to select a reason for crediting the customer.

Note

Credit Note Reasons can be edited by selecting **System > Text Lists > Lookup Lists** from the menu bar and opening **Credit Note Reason** from the [Lookup List](/v1/docs/lookup-lists) Search list.

The **Order Details** tab can then be used to add items and other details to the credit notes using the same process for customer orders.

Once credited, the credit note can then be allocated against the original invoice by putting through a [zero-value customer payment](https://help.megabus.com.au/docs/customer-account-payments#zero-value-customer-payments).