Yes doctors can check and most of the time if your a high risk patient or a new patient they will check the first couple of times. I had a doctor tell me that he will check on my meds every month just to make sure. In my state NC they have a monitoring program that all a doctor or nurse has to do is type in my name and boom there is my complete history of scheduled drugs that I have had filled. Also the police can look at what scheduled drugs you have had filled to. I really think this part is complete bullshit because what about hippa laws they should have to have a warrant or something don't you think? I had a kind of friend that was a narco detective and I was getting about 4 different kinds of c2's and c3's and he came to the house one day and wanted to know why I was on such powerful drugs. He said he was just concerned about my well being and he wanted to make sure I was not abusing them like so many were doing in my town. I told him my problems and he understood, he told me not to be selling them or anything and laughed. Just do what you should and everything should be fine.