What happens if you dont say UNO?

What happens if you dont say UNO? Before playing your next to last card, you must say “UNO.” If you don’t say UNO and another player catches you with just one card before the next player begins their turn you must pick FOUR more cards from the DRAW pile.

Before playing your next to last card, you must say “UNO.” If you don’t say UNO and another player catches you with just one card before the next player begins their turn you must pick FOUR more cards from the DRAW pile.