"Non dir quattro se non l'hai nel sacco: Commedia in un atto" is a funny play by the Italian playwright Giuseppe Giacosa, which inspires the audience with fun and ideas. The plot is woven around a curious situation when the main character tries to sell his father's medals without showing them to the buyer. Comic misunderstandings and humorous situations arise, which rage on the stage, making the audience laugh and captivate. "Non dir quattro se non l'hai nel sacco" is a vivid example of Italian comedy, which will tell us that it is better to be careful and prudent in all life situations.