Question on using my real estate license as an investor!

So I currently have a real estate license, it just isn't active. I was looking to activate it but I was first curious to hear the consensus on having one when you are doing a direct mail marketing or driving for dollars strategy. From my understanding, if I was an active agent I would have to let them know so they could get representation themselves, or so they could sign something stating they were ok not to be represtented before I began talking to them about buying there house right? If this is the case, I was just curious how you might go about this when approaching a lead in either of these situations!

Thanks!