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We study the quantum controlled and probabilistic teleportation protocol viaa four-cluster state (Front. Phys. (2017) 12: 120306). The protocol cannotachieve the goal that if the teleportation fails, it can be repeated withoutcopies of the teleported state. And the reason is that all the information ofthe teleported state shifts to the receiver's particle after Bell measurementand the information cannot shift back to the sender without other entangledstates. To realize the claimed goal, a new quantum controlled and probabilisticteleportation protocol using the same four-cluster state is presented. Becauseno information of the teleported stated is lost during the whole teleportationprocess, the teleportation process can be repeated until the teleportationsuccess.

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