Yes, this address is for the Supplier. You can configure as many receptions of merchandise addresses as you wish from the Inventory tab in the System settings.
When creating a Merchandise Purchase Order, you will have the option to select the desired ship-to address. This address will appear on the printout of the purchase order that you send to the Supplier by email. It is not mandatory to register an address. If no address is recorded, the system will use the coordinates of your branch.
