If Amazon orders land in your Shopify store through Marketplace Connect, CedCommerce, or M2E Pro, you don't need a separate 3PL or Amazon FBA to fulfill them. This guide shows you how to route those Amazon-origin orders to Walmart MCS using your existing WFS inventory - with plain unbranded packaging that keeps you Amazon-compliant, and FOV's per-channel config so Amazon orders are always tagged and tracked correctly. Free plan available.