Finger (Fallout 3)

Fingers are found in Fallout 3 and Fallout: New Vegas.

Fallout 3
In Fallout 3 they are found on evil characters (such as raiders, slavers, smugglers, Enclave soldiers, and Talon Company mercs) when the Lone Wanderer has the Lawbringer perk. They have no weight, and while they have a value of 1, Sonora Cruz will reward you with 5 caps (10 if your karma is very good) and +10 karma for each finger. Any corpse of an evil character killed before you get this perk will not have a finger on it. If the evil character is killed by someone other than you (such as the Mysterious Stranger) or if you do not deliver the final shot the finger will not appear in their inventory. As long as you receive credit for the kill the finger should drop. Junders Plunkett drops a special finger that is worth 1000 caps, and will only spawn once you have the perk. The evil karma alternative of this Perk is the Contract Killer perk (where ears are used instead of fingers).

Fallout: New Vegas
Fingers seem to have no purpose beyond decoration for a home. "Bounty" items in New Vegas are instead Legion ears and NCR Dogtags.

A finger can be found in Gibson's Shack on the wall near the skeleton. A machete is holding it to the wall.

Bugs

 * Sonora Cruz can’t take more than 999 fingers at a time. If you have more than that in your inventory when delivering, she only takes 999 but still rewards you for all of the fingers (12,800 caps for 1,280 fingers with very good karma, for instance). You can deliver the remaining fingers for more karma and caps.

Dedo Палец