Is there any law that prohibits we buy houses signs?

[Cesar Nieto]

Guys, I was wondering if there was any law that would prohibit me from putting up a big sign in many of my job site construction fences that say "we buy houses", But only intend to put houses under contract to assign contract to another buyer. My concern is that if I can't line up another buyer and I have to get my deposit back and terminate the contract, can I get sued for false advertisement or something like that? I would appreciate some input. Thanks !