Fastbay uses as a key to recognize products a code composed of the word “Prestashop” + “Product ID”.
When a synchronization is performed, this value becomes the eBay custom label.
This is the module’s default behaviour, so when downloading an order, the module checks the value of the Ebay custom label for a reilable product recognition.
In the case of a product with variations, the order filter will also show the id of the combination (e.g. prestashop-34-1).
You can change this behavior through this option, available in the Orders tab of the form:
Use product reference as eBay custom label
This feature will allow you to enable sending the product reference/variant as a custom eBay label.
By enabling this option, the standard order download functionality of the module (order filter + product id) will be ignored.
It is therefore necessary to make sure that all products / variants sent to eBay have a custom label correctly populated with the same product reference of your site.
NOTE It is mandatory that all Prestashop products have a valid and unique reference. In the Utility section of the module you can find a tool that will allow you to generate a CSV of the products on your site with duplicate / empty references in order to correct them before activating this mode.