Diffrerentiating Vendors used by different Companies

Hi,

In our Client's JDE environment , multiple Companies in different locations within an geographical area eg: within Africa (Location) - Uganda (Company), Kenya (Company)  etc  does business with the same Vendor. What is the Global standards in differentiating these Vendors for each location ?

Below are some of the ways to differentiate the suppliers:

1. Creating different address book number for the same Vendor and using one of the Category codes to capture the location.

2. Creating different address book numbers and differentiating it by different sequence of numbers eg: Beginning with 1 - Uganda supplier, Beginning with 2- Kenya supplier etc

The goal is when an user from a specific location needs to book an entry to a supplier , what is the best way for him to identify that the supplier belongs to his location and does not pickup the same supplier pertaining to other location.