Teleporting Pieces of a Person

So the victim is willing to teleport with the bad guy, failed a bluff roll, or some other reason. Since the person is willing, can the bad guy grab hold of the head, teleport, and only bring the head?

Nope.

Nope..
but totally be a fun save or die spell in the works there..

Teleport

Range personal and touch
Target you and touched objects or other touched willing creatures
Duration instantaneous
Saving Throw none and Will negates (object); Spell Resistance no and yes (object)

Note that the target is either a whole object or a (whole) creature. A piece of a creature or object is not a valid target.

I don't get the scenario.
The victim used Bluff to [/b]pretend[b] she was willing to accompany the BBEG via teleport?
She failed the role to persuade the BBEG and the BBEG holds on to her head and tries to teleport away?
-->No, since the target is not willing.

A piece of a creature or object is not a valid target.

Huh? How's that? If you're dead, your corpse becomes an object. If you got vorpaled with a sword i.e. you're dead, I could grab your head (an object) and teleport away with it.

Same goes for say a diamond which was once part of a statue. I pry it away, pocket it and teleport away with the diamond.
Or say a shard of a Ming vase or a twig broken off from a tree or a handful of sand taken from a sand dune or...

Ruyan.

If you cut off their head first, then it is a separate object and you can teleport with it. You cannot use teleport as a means to separate their head from their body when they are living or dead.

I don't get the scenario.

The victim used Bluff to [/b]pretend[b] she was willing to accompany the BBEG via teleport?
She failed the role to persuade the BBEG and the BBEG holds on to her head and tries to teleport away?
-->No, since the target is not willing.

Sinistrad wrote:

A piece of a creature or object is not a valid target.

Huh? How's that? If you're dead, your corpse becomes an object. If you got vorpaled with a sword i.e. you're dead, I could grab your head (an object) and teleport away with it.

Same goes for say a diamond which was once part of a statue. I pry it away, pocket it and teleport away with the diamond.
Or say a shard of a Ming vase or a twig broken off from a tree or a handful of sand taken from a sand dune or...

It becomes a valid target once it's broken off. You can't grab the arm of a fully-intact statue and teleport away with just the arm without breaking it off first.

I think people are taking my post out of context, the context being in direct response to the OP.

Sometimes I forget this is the Internet.

@RyuanVe

Bad guy: Hey, I'm good now. Let me take you to fun land. *Rolls bluff, succeeds.*
Good guy: That sounds awesome! Let's go right now.
Bad guy: Okay. *Grand head and teleports.*

Teleport to lava while being immune to fire damage in some fashion.

The short answer is no, you cannot use teleport to teleport just a piece of an object/creature. You could however teleport someplace harmful to the other creature, that you may have prepared yourself to be immune to.

Theres a psionics power that teleports bits of someone.

Since the effect you're going for is basically to kill your target, what you want is phantasmal killer.