Taarak Mehta Ka Ooltah Chashmah S01 E2693 A Strange Message

"Problems Toh Hain Sabke Saath, Bas Nazariye Ki Hain Baat!"

Popatlal receives a strange message from a stranger. Taarak plays the message on his laptop on which there appears a strange man with a message for all of them saying that they received a free ticket to Singapore. Who is this strange man?