[isoka]

Human skeleton in KC is on Venril Sathir faction, which means that it can be non kos to you. Dropping ivu when you hand him the jar might just have him consider you indiff and the turn in will work.

Human skeleton in CoM is KoS to anyone. So handing the item will fail because it requires indiff or higher to work.

Therefore, Have someone charm the human skeleton in CoM to turn in the jar so that the skel is indiff to you
or stay out of los from the skeleton (using the corner), hand the item but don't trade it yet, have someone ivu you so that skeleton looks indiff to you, and then hit trade while ivu is still on.