Legal issues with referal incentives?

[David Tower]

Hello BP,

I'm about to order some business cards to blanket for sellers....the ones you leave everywhere saying what you do.

I was planning on saying I offer $250 or $500 (hadn't decided yet) referal bonus on any house we buy but I started thinking about the possibility of that somehow turning in to a legal nightmare. Does anyone have experience with that sort of incentive?

Thanks!