According to this CBC article from 2015, some people in Quebec cut bank notes in half, which are then used as two separate notes each worth half the original value. These notes are known as "demi", and are not widely accepted:
"It's money that can only be circulated among these local users," said Patrick DuBois, a demi user from Carleton-sur-Mer, Que.
"No one else will accept it anywhere right now."
However, another person is quoted mentioning tourists:
Martin Zibeau, a demi user from Saint-Siméon, said it's impossible to know how many people are using the quirky local currency, but he personally knows of more than a dozen.
"It's something that's still developing. It's funny --- there are a lot of tourists who have seen it and spread the word across Quebec."
My question is: Is there any risk that I, as a tourist, will be given a demi note in change, which I will then find myself unable to use elsewhere?
Associated side questions (which will probably help answer the main question) are:
Does this practice still exist? Is it widespread?
Can I refuse any demi notes I am offered and insist on unmutilated currency instead?
As it may influence answers, please note that I am planning on visiting Saint-Siméon, so it's not like "this only applies in obscure places you'll never visit".