Board Thread:Wikia Questions and Answers/@comment-173.184.204.234-20131113193954/@comment-3474542-20131114090528

A shorter explanation is this: A shipping license is between the locked farm (for example "Lighthouse Cove") and your home farm. If you have multiple shipping licenses (for example: Lighthouse Cove and Mystical Groves) you can transfer the items between the two (or more) licensed farms via their connection to the home farm.