Adina's outdoor wedding party is in full swing. Dr. Dulcamara is there, and performs a song with Adina to entertain the guests. The notary arrives to make the marriage official. Adina is sad to see that Nemorino has not appeared. Everyone goes inside to sign the wedding contract. But Dulcamara stays outside, helping himself to food and drink. Nemorino appears, having seen the notary, realizes that he has lost Adina. He sees the Doctor and frantically begs him for more elixir, of the type that will work immediately. But because Nemorino has no money, the Doctor refuses, disappearing inside. The Sergeant emerges, alone, wondering aloud why Adina has suddenly put off the wedding and the signing of the contract. Nemorino spots his rival, but is powerless to do anything. The Sergeant asks about Nemorino's dejection. When Nemorino says he has no money Belcore immediately suggests that if he joins the army he'll be paid immediately. He produces a contract, which Nemorino signs (with an X) in return for the cash Belcore gives him on the spot. Nemorino privately vows to fly to Dulcamara for more potion, while Belcore muses that he has easily dispatched of his rival by sending him off to war.