Canada

Culpability party. The whole point is to enact laws that make people culpable for the things they say. If a member of parliament accuse something, and it's found not to be true, they get some sort of penalty. If they promise something during elections and it doesn't happen after they get elected, they and their party gets a punishment.

And not just some sort of slap on the wrist, but something substantial enough that repeat offences can be career ending within the field of politics. Politicians need to be responsible for what they say, as words are their weapons of choice, and with the level of power they have, they should also carry that level of responsibility.

While there is something to be said about saying something wrong due to ignorance, it's another matter to say something with authority on a subject one is ignorant about. You can't just say something like abortions should be outlawed because women can just turn off their fertility (yes, a politician actually said that).