How LTL shipping to Amazon works
When you create an FBA shipment in Seller Central and choose less-than-truckload, Amazon assigns a destination fulfillment center and generates your FBA shipment ID and pallet labels. You can use Amazon's partnered carrier program or bring your own carrier. With your own carrier, the carrier requests a delivery appointment through Amazon Carrier Central, and the freight must arrive during that appointment window.
Amazon fulfillment centers operate on scheduled appointments. Freight that arrives without an appointment, or misses its window, can be turned away and may need to be redelivered, adding redelivery and storage charges.
Delivered In Time helps you compare LTL carriers that deliver to Amazon facilities and coordinates the details your carrier needs for the appointment.