Occasionally you will find some of your messages are marked as UNK. Our UNK status means that ameliaRES is unfamiliar with one or many parts of a message. Generally, this means that we do not handle the action codes within. Below are a list of action codes that we've seen sent by travel agents that we know we do not handle.

Code	Stands for	Note
HL	Have listed on Waitlist
LC	Limit Sales, Waitlist Closed
LK		will be supported after 20.11 release
IX	If Holding, Cancel	will be supported after 20.11 release
PU	Advice of passive segment
PK	passive booking

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