Marker transaction monitoring

Signal emitting lamer buttons coming within range of a sensor underneath a gaming table are detected. The signal carries the lamer button's identify and denomination. The transmitted information, which can also include an identification of the gaming table and the sensor, is recorded in a log so that every lamer button that gets placed on or removed from the gaming table will be recorded. Like the lamer button, a signal from a buy back button can also be detected by sensor, where that signal carries an identifier signifying a loan repayment by a player in the amount of the lamer button(s) on the gaming table. The placement on, of removal from, the gaming table of any button is detected by the sensor, which in turn triggers a visual recording of button movements. As such, marker scams can be detected using the log and/or the visual recording.