I have a question about how Catholic canon law would treat an unusual (but not unheard-of) marriage situation.
Say that two Catholics are married to each other, and the husband is involved in an incident during which he is believed to have died. For example, say the husband is an air force pilot who is shot down in a war, or maybe he becomes suicidal and is last seen jumping off a bridge. Even though no body is recovered, the available evidence is such that both the secular and ecclesiastical authorities pronounce the husband dead.
Fast-forward ten years. The widow has remarried. But suddenly the dead husband shows up very much alive. It turns out he survived the plane crash and was captured by the enemy, or that he faked his own death.
I have no doubt that the secular authorities wouldn’t be interested in pursuing bigamy charges, since there was no criminal intent or negligence on the part of the wife. There might be some paperwork to fill out as a formality, but they would let the second marriage stand.
But what would the church’s view be? I can imagine that the wife might be obliged to have her second marriage ecclesiastically anulled, as the church considers marriage to be “till death do us part”, and it was later proven that there was no death. Is this correct? If she refused to accept the anullment, wouldn’t the remarried couple be considered living in sin, and barred from communion? Would any children they have be canon-legally bastards? (I know that children they had before discovering the husband survived are OK, as children in putative marriages are legitimate even if the marriage is later discovered to be invalid.)
So, yes to everything; any children born after that would be illegitimate (technically not bastardi, but nothi, according to the Catholic Encyclopedia) and possibly not legitimable.