Originally Posted by hockeyguy
The airline can certainly have a record in their system and flag it when the bag tag is scanned coming off the plane.
Airlines are no longer permitted to record any information about what luggage has what. IF alaska is doing it, they may be violating the rules..
The tag you put inside your bag shows up in an Xray as a particular shape, so the TSA knows its been declared. Thats the only way the airline/TSA should know you have a gun in your bag.