Fulfillment by Amazon (FBA) is a service Amazon offers its third-party sellers. Using FBA, sellers send their goods to one of Amazon’s fulfillment centers, and Amazon ships the items to the customer. Customers who buy FBA products usually get their items rather quickly. When an item sells, employees pick and pack the order and it leaves the warehouse shortly after the sale. Amazon’s shipping partners, including the USPS, work hard to ensure timely delivery. Even companies that don’t deliver on Sundays will ship FBA products seven days a week. It’s fairly simple to use FBA. Sellers must contact Amazon after they prepare their listings. They provide several details, including product information and the quantity they plan on sending. Amazon tells the seller where to send the shipment and they handle deal it from there.