Canada

Notably, in the "close" referendum, polls at the indicated many (the majority, I think?) of "leave" voters thought they would still be using Canadian money, still be part of the Canadian military, and thought there wouldn't be a border crossing/customs to travel to other provinces.

Sounds very similar to what's happening in Alberta, except that it's not at all close.

There was also the Clarity Act that explicitly requires much more precise language in any future separation referendums. Alberta is explicitly not pursuing a referendum right now, and the cynic in me expects that's because the Clarity Act would make a referendum result laughable at best. And risk causing a schism in the already-wobbly ~~Wild Rose~~ Alberta Cons Party.

The House of Commons must decide if the referendum question is clear and unambiguous, asking directly about secession. (emphasis mine)