A Queens man tried to illegally sell three Manhattan buildings that belonged to somebody else — and got a $1.6 million down payment from a potential buyer, authorities allege.

Queens District Attorney Richard Brown says a criminal complaint names Kook Hee Nam, also known as David Nam. The charges include grand larceny, forgery and identity theft.

The buildings are on Seventh Avenue between 30th and 31st streets. Their owner says the defendant never had permission or authority to sell them.