Katamaze Documentation
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Credit notes, reverse invoices, invoices and proformas
Viewed 2463 times since Wed, Feb 3, 2016
Proforma vs Invoices In WHMCS there's a clear distinction between proformas and invoices. We're going to explain the differences in case you don't know what is a proforma. An invoice, also known as commercial invoice, is a real invoi... Read More
General Settings
Viewed 1335 times since Tue, Feb 2, 2016
  The settings below can be found and configured in the back-end of your WHMCS in Addon Modules page by clicking Configure button Lock invoice on Client's details and currency WHMCS gets all the data visible on invoices directly from databas... Read More
Introduction to multi-brand billing
Viewed 1198 times since Mon, May 9, 2016
Multi-brand billing allows you to invoice your clients from different brands using the same installation of WHMCS. To make things easy to understand, let us make an example with a company of the automotive industry so let us assume you are the owner ... Read More
Module upgrade
Viewed 1095 times since Mon, Mar 21, 2016
When you need to upgrade your module to the latest version, first check what is the version number that you are running on your WHMCS. You can find the version of your module by visiting Setup > Addon Modules page. The column Version always shows ... Read More
Simplified Invoicing
Viewed 1051 times since Wed, Feb 3, 2016
Set invoice date on payment Simplified Invoicing Simplified Invoicing can be enabled and disabled from Addon Modules page Invoicing In many aspects WHMCS invoicing is good even if it requires a lot of tweaks but probably the most annoying proble... Read More
Tips and tricks of Billing Extension
Viewed 932 times since Wed, Mar 2, 2016
In this page you can find a list of tips and tricks that you can use in your WHMCS in conjunction with our Billing Extension module. Auto-Tags WHMCS uses auto-tags to let you customize the Sequential Invoice Number Format. You can configure them in S... Read More
Overpayments: Mode 1, Mode 2
Viewed 927 times since Thu, Mar 3, 2016
  This article is valid for versions of Billing Extension up to 1.5.5. For newer versions please refer to the updated article here.   Overpayments Overpayments It may happen that a customer wrongly pays an invoice twice or sends you a payment gr... Read More
VIES support for WHMCS
Viewed 859 times since Sun, Apr 3, 2016
  What is the VAT Information Exchange System (VIES)? For all questions about VIES, please refer to the official FAQ page directly available on the website of European Union on ec.europa.eu. The VIES-on-the-Web (VoW) service is monitored on a d... Read More
Toggle Invoicing
Viewed 812 times since Sat, Apr 15, 2017
Factors that led us to develop Toggle Invoicing First of all for simplicity's reasons. We know how much tedious and frustrating the renewal of products, services and domains can be for many clients. In WHMCS clients have to deal with pages like ... Read More
Invoice overpayments
Viewed 243 times since Mon, Sep 4, 2017
An overpayment occurs when a customer provides payment for more than the total remaining balance of an invoice. Even though it may seem infrequent, it can happen quite often due to automatic payments, subscriptions, product price changes. WHMCS creat... Read More
Credit & Taxes
Viewed 204 times since Mon, Sep 4, 2017
By default, WHMCS doesn't charge sales taxes for Add Funds invoices. In many countries this is considered illegal since it constitutes tax evasion. Billing Extension can handle this issue both when customers add funds and when they use it. Let&#... Read More