Boxed Transpo is a powerful four-phase card transposition routine. A spectator selects and signs a card, which is lost in the deck. Two other cards, chosen by the spectator, are then used in a series of transpositions where one card is placed inside the card box and the other remains outside. The cards switch places multiple times, each phase building in complexity, culminating with the spectator's signed card ending up inside the card box. This routine uses a regular shuffled deck, requires no gimmicks, and is designed to be highly visual and easy to perform.