A False UNO, meaning that a player forgets to call UNO before touching the discard pile, results in a three-shot penalty. ... Your order will include the UNO cards, the rule card, and either four, six, seven, or eight shot glasses. If you order four shot glasses, you'll get two reds, one blue, and a yellow.

What happens when u call a false UNO?

There is no penalty for falsely calling UNO and while there are no rules in the instructions on yelling out the cards someone saw from a challenge, we don't think it's a nice thing to do.

Can you lie in UNO?

There is no rule stating how a player must hold their hand. The only relevant section, is that you must declare UNO when you are down to 1 card, and that if you are caught - you must draw 4 cards. As such, it is "legal" to hide the cards. That said, most people play UNO with friends for fun.