How can real estate agents send direct mail the legal way?

[Charlie Kleindinst]

I know there's a lot of grey areas for real estate agents when it comes to doing non-traditional real estate deals. My brokerage is very investor friendly so I have the green light to use every strategy out there. My question is when it comes down to me sending out direct mail to properties I have personal interest in, what must I disclose? My brokerage name? The fact I'm a "Realtor"? What if I'm to leave a simple yellow letter on someones front door? Can I disclose the fact I'm a real estate agent as soon as the prospect calls me?