Chadder sold me so many fake paintings in Noveon that I stopped counting. Only once did one of them turn out to be legit...
Every time Flo has tried to sell me a painting and I've bought it, it turned out to be real. There was only one time when it was fake. She even sold me the same painting twice, I don't know which, but it is always real and I said no both times but she said it was fake and she gave it to me. I was like what? But I put it at home and it was real, lol. And then I sold it because I had no use for that.
LOL, talk about confusion. I think certain paintings will always be real, according to a Crazy Redd guide. Not sure if it applies to villagers selling you paintings though.
sylvia sometimes gives me paintings. only 1 was fake. up till then i thought uchi villagers only gave you genuine paintings. i was so excited to finally have a jolly painting, too...
if it helps, the perfect painting, nice painting, common painting, flowery painting, warm painting, fine painting, proper painting, worthy painting, calm painting, moody painting and scenic painting are always genuine. it's a surprisingly long list.
im super rich in ACNL i dont really care i buy it from them anyway...