Boo to you, Matt!
How spooktacular that you get to experience 
Halloween Time at the Disneyland Resort by attending 
Oogie Boogie Bash – A Disney Halloween Party. Though, I’m sorry a member of your party can’t make it. Sadly, the same thing happened to our family, as a member of our ensemble of hitchhiking ghosts was detained at home. Though each 
Disney eTicket is tied to a particular name, that is mostly for your convenience in determining which ticket should be used for which guest. The tickets only become non-transferable once they are activated and used for the first time. So, yes, you are permitted to pass that ticket along to another guest. In fact, that is what we did with our available ticket. I sent the image of the eTicket to a good family friend, who was able to use the ticket that night.
I hope you will still be able to experience the offerings of the Disneyland Resort together with your missing party-goer another time this season. With so much 
delicious food, exciting, 
limited-time entertainment, and even some of the year’s most amazing 
attraction overlays, there is much to see and experience in both parks. Even the 
Disneyland Resort Hotels join in the spell-ebration.
Have a frighteningly fun time, Matt!
~Tony