From 1st March eBay has a new rule: it is mandatory introducing the product identifiers in the major part of the categories.

eBay’s Official Web

What is SUPI?

With the purpose of helping the sellers, eBay has developed SUPI (System Update Product Identifiers). This tool is free and counts with the following characteristics:

• Inventories checking.
• Automatic updating.
• Updating files for File Exchange, Magento and MIP 2.
• Recommendations about product identifiers of the active and listed ads in Germany, Spain, France, Italy and United Kingdom.