In the film it is stated that she was named after her accidental preterm birthplace, Tiffany & Co., where her parents were going through a choice of wedding bands, to which Bond dryly jokes that she was lucky that it had not happened at Van Cleef & Arpels.

She receives orders from a telephone voice known to her only as "A B C" (actually Jack Spang, one of the mob's co-founders and the manager of its European operations), and keeps watch on couriers as they transport the diamonds from Europe to the United States.

She also works as a blackjack dealer at the Tiara, a Las Vegas hotel and casino owned by Jack's brother Seraffimo that serves as the mob's American headquarters.

In this novel, Fleming writes that Tiffany found Bond too difficult to live with and returned to the United States with an American military officer, apparently intending to marry him.

[5] Boel Ulfsdotter argues that "Fleming's characterization of Case was found wanting when transposed from novel to screen": whereas she is portrayed as a "hardworking, independent, and single woman" in the novel, her character is watered down in the film.