Advertising

[A M]

I am under the impression that if one has a property under contract and one has not as yet closed on it - which means that you do not as yet own it - is it true that one cannot advertise that property, i.e. advertising in the newspaper or other general public media. If this is true, how can one try to sell it legally for say, a wholesale or assignment of contract transaction ?

I have come across a realtor that said that if you don't own the property you can't advertise and sell it.

Just having a contract on a property means that you have an interest in the transaction but you still are not an owner of the property unless you close on it.
Although one would not indicate that you are not the owner when advertising the property, could there be a potential legal problem ? Would appreciate a reply Thx