How do you spot a fake painting in animal crossing?

Answer 1

Redd will say something like, "It took Crazy Redd a long time to get his hands on this," so that's how you know it's a counterfeit. If you accidentally buy it and take it to the museum, Blathers will tell you that it is a counterfeit. But they are really pretty decorations in your room if you accidentally bought it.

Answer 2

u have to go to tom nook once u bought it and if it sells for only 5 bells it is a fake, so just keep it in your house.

Answer 3

The only way is to buy it. You can either try selling it to Nook and he will tell you if its fake, or try giving it to Blathers and see what he says.