Amazon’s Multi-Channel Fulfillment (MCF) is a program that lets you sell anywhere online, but still use Fulfillment by Amazon to ship your customer's orders. Amazon MCF helps you grow your business by giving you access to Amazon’s world-class fulfillment network, operational expertise, and trusted shipping options for all of your orders, from wherever they’re placed - both on Amazon.com and on other sales channels.
 

Website: https://services.amazon.com/fulfillment-by-amazon/multi-channel.html