No, you do not have to say "Uno" when you have one card in your hand in the game of Uno.
Yes, in the card game Uno, it is customary to say "Uno" when you have one card left in your hand.
You say "uno" in a game of Uno when you have only one card left in your hand.
You say "uno" in the game of Uno when you have only one card left in your hand.
You say "uno out" when you have one card left in your hand and you are about to play it in a game of Uno.
You can say "uno" when you have one card left in your hand during a card game.
Yes, in the card game Uno, you have to say "Uno" when you have one card left in your hand in order to win the game.
You say "uno" when you have only one card left in your hand during the card game.
You have to say "uno" when you have only one card left in your hand while playing the card game.
When you have only one card left in your hand in Uno, you must say "Uno" out loud before playing that card. If you forget to say "Uno" and another player catches you, you may have to draw two penalty cards.
You are supposed to say "uno" when you have only one card left in your hand during a game of Uno.
You should say "uno" when you have only one card left in your hand during a game of Uno.
You should say "uno" when you have only one card left in your hand during the card game.