It was as if, in the highly unlikely event that their wishes were granted by John of God, they just wanted to make sure that they weren't delivered to the wrong person or the wrong address.
Era como si, en el caso altamente improbable de que Juan de Dios les concediera esos deseos, simplemente querían asegurarse de que no fuesen entregados a la persona equivocada o al domicilio equivocado.