A lavalier mic can (purposefully) be seen during a few scenes, which is a Karch Brother trademark, notably when Robert is in the diner with Franklin - the mic is located inside the open brief case; and when George is driving his car and speaking to Samantha - the mic is clearly seen hanging over the back of the car seat. Also the script is shown (also a Karch brother trademark) during the restaurant scene where Robert and Franklin sign the real estate documents.