This is where one character gives another character an item as the symbol of an express or implied promise, with the intent that it will be returned at the fulfillment of such promise. The item does not have to be valuable or important in any way except as a symbol of the promise. It may function as a #1 Dime, a Memento MacGuffin, or even an Iconic Item, but not always. Usually this promise is to be reunited later after some separation, such as one character being taken to jail.
Usually happens during a Heartwarming Moment.
- One Piece: When Shanks gives Luffy his hat- with the promise to become strong.
- Dragon Ball: Goku's four-star Dragonball, given to Bulma to use for a wish.
- Hunter × Hunter: During the Hunter examination arc, Hisoka gives his badge to Gon asking for it to be returned when Gon is strong enough to punch him.
- In the beginning of Rurouni Kenshin, Kaoru lends Kenshin her hair ribbon so that he will come back. At the end of the arc, he gives it back, and she flips out, because he bled on it after getting stabbed in a duel while rescuing her.
- A more subtle example in the very last scene of Hero. Bernie and his son are at the zoo, when he hears that a woman's son has fallen into the lion's pit. Bernie hollers for a zookeeper, but when it's clear there's no help coming, he has to step forth. But first, he tells his son to watch his shoes.
- The Mask of Zorro: The first Zorro gifts Alejandro and his brother a silver medallion when they help him fight off Don Rafael's guards. Years later he recognizes Alejandro because of it and recruits him to become the new Zorro.
- Battlestar Galactica (2003): Before Lee has to lead a mission with low chance of success, Bill entrust to him his own fathers lucky lighter. Lee promises to give it back..
- Star Trek: Deep Space Nine has a not-so-friendly version. When the Dominion captures the station and the Federation is forced to evacuate, Sisko leaves his baseball behind in his office. Dukat immediately understands the message. When the Federation reclaims the station, Dukat hands the ball back to Sisko to acknowledge his defeat.
- Final Fantasy XII: Balthier comforts Penelo with his handkerchief, promising to bring Vaan back.