If you want the module to properly send your EAN and / or UPC data onto your eBay products specifics, please make sure that you have correctly set these values in the Prestashop product sheet.
Also remember that a product with variations will have a EAN / UPC per-combination (which can be set in the “Combinations” tab of Prestashop).
Note that Ebay will validate the EAN / UPC value during product synchronization and may refuse the listing if it is the value is not formally correct.
IMPORTANT: In case of a product with variations, the EAN / UPC will not be publicly displayed in the Ebay template (this is because of the “static” description of Ebay) but will still be sent from the module.
You will be able to check the correct submission of those data by accessing the item from your Ebay account.
If the EAN / UPC field will not result compiled, it means that the data is not yet required from eBay.
If you want the module to send the “Does not Apply” value when your product have an empty or invalid EAN/UPC, do not forget to enable the appropriate option in the first module configuration tab (see general module configuration documentation).
If you want the module to correctly send MPN and Brand, you must configure these specifics in the “Specifics / Conditions” tab.
In the absence of such configuration, MPN and BRAND will not be sent to Ebay and you will get an error if this value is required .
Tip : MPN is usally linkable to ID product, reference or supplier reference – Brand is usually linkable to Prestashop manufacuter field.
If you need further details on specifics configurations, see the “Conditions / Specifics” section in this documentation.