Trying to claim pot with one card.

[MARK R]

This had been happening a lot at my local casino and there is one player who just keeps doing it. This is the situation.

The player makes a bet I call. The player shows one card and I then say thats good. The player then mucks his other card which now cant be retrived. Should this player still win the pot. I keep warning the player if he does it again I will claim the pot but he keeps doing it. Do I have the right to claim the pot if he only has one card?

Mark.