If you search for Ship and Confirm Shipment (and get paid) - Order Fulfillment
on Seller Central it will bring you to a page that provides the XSD and a sample XML file for this feed.
The XML is provided below per your request:
<?xml version="1.0" encoding="UTF-8"?>
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
<Header>
<DocumentVersion>1.01</DocumentVersion>
<MerchantIdentifier>My Store</MerchantIdentifier>
</Header>
<MessageType>OrderFulfillment</MessageType>
<Message>
<MessageID>1</MessageID>
<OrderFulfillment>
<MerchantOrderID>1234567</MerchantOrderID>
<MerchantFulfillmentID>1234567</MerchantFulfillmentID>
<FulfillmentDate>2002-05-01T15:36:33-08:00</FulfillmentDate>
<FulfillmentData>
<CarrierCode>UPS</CarrierCode>
<ShippingMethod>Second Day</ShippingMethod>
<ShipperTrackingNumber>1234567890</ShipperTrackingNumber>
</FulfillmentData>
<Item>
<MerchantOrderItemID>1234567</MerchantOrderItemID>
<MerchantFulfillmentItemID>1234567</MerchantFulfillmentItemID>
<Quantity>2</Quantity>
</Item>
</OrderFulfillment>
</Message>
</AmazonEnvelope>
From the documentation:
Once you've shipped the order, send Amazon a shipping confirmation with fulfillment information