Is it OK to accept down payment on a house that I didnt close yet

[Kumar Chin]

I am buying a house with all cash, which is supposed to close soon, title search is being done now. Im trying to sell it for a lease option. Is it OK to accept the down payment from the end buyer if they like the house and want to buy it?

I found another great deal for which Im short of money. If I accept the down payment, I should be able to buy the other deal too. Im nervous that someone else might pick it if I delay. The end buyer really liked the house but i havent closed it yet. 

What is the best way to deal with the situation and protect myself without getting into trouble? Any feedback is really appreciated.