This extension displays additional custom fields in order invoice on OpenCart in the admin Orders section. The module adds custom client fields and custom address fields to invoice.
To display custom fields in the invoice form, simply install this plugin and update the modification cache. Custom fields in the invoice will be displayed in the block with customer's address.
With this extension, you can add to invoice own custom fields, such as: VAT ID, TAX ID, DPH, house number, apartment, office, etc.
Module installation instructions:
Upload the module in the admin panel in the "Extensions" : "Install".
Go to the "Modifications" section and update the cache.
Go to the "Dashboard" section and update the template cache.
Bingo!
Changelog of Custom fields in order invoice
v1.0.1 (25 May 2023) - The problem with adding custom fields to the Delivery address has been fixed
On November 20, 2025, a new major release of PHP was published - version 8.5. PHP 8.5 introduces useful improvements, but requires a careful approach when integrating into existing OpenCart projects.
Let’s look at OpenCart optimization methods that don’t require purchasing additional modules or paying for services. The main stages of OpenCart speed optimization.
✕
We use cookies and other tracking technologies to improve your browsing experience our website, to personalize content and ads, provide social features media and our traffic analysis.
Necessary cookies enable core functionality of the website. Without these cookies the website can not function properly.
Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.
A set of cookies to collect information and report about website usage statistics without personally identifying individual visitors to Google.
Marketing cookies store user data and behaviour information, which allows advertising services to target more audience groups.