Crowley did not engage in ANY fact checking or confirmation. He was the one who convinced the nuns that the baby needed to go to the different room, the room that he established by speaking with the British guy outside the convent.Dirty Hipsters said:Except that's not what happened. Crowley didn't screw anything up, he wasn't the one who gave the child to the wrong parents. He gave the baby to the nuns, like he was supposed to, and the nuns gave the baby to the wrong parents. Crowley being lazy about his job and not really being a "bad guy" doesn't factor into this at all. Crowley not being there wouldn't have changed the outcome in the slightest. Had he been written out of the story and a different "competent" demon been given the task instead nothing about the main plot would have changed.
Crowley screwed up. He showed up, didn't really care, assumed the British guy was the diplomat, and told the nun to take the baby to the wrong room. The nuns followed his orders, his orders were wrong, Adam got put with the wrong family, and then Crowley became the nanny to the RIGHT family and didn't recognize that the diplomat looked different to the person he spoke with outside the convent.
It's a comedy of errors and the child was raised without influence from either side, foiling the plans of the devil and the angels. The angels didn't get the big fight they wanted, the devils didn't get their antichrist, and humanity survived on its own merits.