Create listings for the first time:
After you register as a selling partner and sign up for the Fulfilment by Amazon New Selection Programme, you can create offers in one or more European Amazon marketplaces. Select the Fulfilment by Amazon option when listing your items. We'll guide you through the process of sending products to a fulfilment centre.
Switch to Fulfilment by Amazon for existing listings:
Visit the Manage Inventory
page on your Selling Partner Account, choose the products that you want Amazon to fulfil and click on Convert to Fulfilled by Amazon under Actions.