A few people asked me today via email about the validity of a baptism wherein someone used the hand of a dead person to pour the water, someone moving the hand.
A rare scenario, of course, and one that is surely super-charged with deep emotions before which we should maintain respectful distance.
However, as to the validity of such a baptism, provide that water was used, and that it touched the head while the proper words, the proper form of the sacrament was pronounced, there is no question that such a baptism would be valid.
Think about it this way. When baptizing, priests often use the “shell” to pour water. The instrument or means of making the water arrive on the head is not a determining fact in the validity of the sacrament. A priest can use his own hand, a shell, some other instrument to pour… whatever.
That said, if this or any other baptism were performed quickly and without the other ceremonies, I would recommend that a more formal rite take place to supply the ceremonies that were lacking at the time.