Similar to the Immunity Idol that grants a group of Survivors exemption, the Immunity Necklace grants one individual safety at the next Tribal Council.
When a contestant is in possession of the necklace, it is brought back to camp and typically placed on the shelter. While other castaways can "try on" the necklace, ownership lies solely with the winner and cannot be stolen by another, unless the winner decides to give up the necklace.
From Survivor: Borneo to Survivor: Africa, the necklace was non-transferable, leaving allies vulnerable. Because of the size and starting from Survivor: Marquesas, the necklace became a transferable item, permitting a castaway to hand it to another. This has proven to be a dangerous (and sometimes risky) move.
Typically, the Necklace will fit with the motif of the season, with some tribal design or small tiki attached. Other designs include feathers, tiki heads, skulls, and even teeth. A winning contestant will wear the necklace at Tribal Council around their neck to indicate their exemption from being voted against.
During Survivor: Nicaragua, both tribes competed for Individual Immunity. In previous seasons, two necklaces would both be similar in appearance; however, La Flor and Espada had their very own unique designs and tribal colors, with either a Fleur de Lis or a Sword.
During Survivor: Micronesia, as a part of a first challenge, a special idol is placed on the front of the raft of both Airai and Malakal tribe. The rule is almost the same as the necklace, only the possession right lasts until their tribe's first tribal council. The immunity idol was found by Yau-Man Chan and Kathy Sleckman respectively (technically, Jon Dalton found the idol first; however, he mistook the opposing tribe's idol for his, and Yau-Man reached theirs first). The two idols were removed from game after episode 2 as both tribes went to tribal council once each in two episodes.
In Survivor: Gabon, there were two individual Immunity Idols, one for each tribe. The Idols was place at the top of the hill. The first person to each the Idol gets it for their tribe. Marcus Lehman and GC Brown got to the immunity idols for their respective tribes. The Idols was removed from the game after episode three, as both tribes went to tribal council in the first three episodes.
John Kenney was the first person to win the individual immunity necklace in the tribal phase of the game.
Ami Cusack was the first woman to have individual immunity before the merge. However, she was given immunity by John.
Candice Woodcock was the first woman to win the individual immunity necklace in the tribal phase of the game. Kathy Sleckman won individual immunity before Candice did but she was given an immunity idol instead of the necklace.
Jenna Morasca was the first contestant to ever give away the immunity necklace.
Burton Roberts was the first male contestant to give away the necklace.
Erik Reichenbach was the first contestant to be voted out after giving away the immunity necklace.