The perils of papal resignation notes

The pope says he's written a resignation letter. What could go wrong?

Pope Francis on Sunday told a Spanish newspaper that he signed years ago a kind of conditional letter of resignation, on file with the Vatican Secretariat of State’s office, which could be effected if the pope became medically incapable of fulfilling his duties.

While the notion of such a letter is not a novelty - and several popes before Francis have si…