Is it possible to check whether companies VAT ID field is unique?
In default EPESI installation there's no such option. But some time ago someone was trying to create such module. We offered our help, but in the end I wrote that module.
I attach an updated version to this post. I can not guarantee this will work as expected, some programming knowledge is better had to resolve possible minor issue that may turn up.
I can not install this module. I copied it to the server, but the Administration did not see the module.
I forgot to mention that the module can be found under optional components in CRM package (assuming Simple View is enabled).
Also, please make sure that after placing the module you selected option "Rebuild modules database".
This module does not work if the company has the status of a private.
How to modify the code for the module to check for a private company?
A sample message for this event: The Company with TAX ID has been created by xyz.