A placard system for use in the transportation industry. The placard system includes a holder including a cavity and a placard fastener mounting hole. The cavity is configured to receive a placard. The placard fastener mounting hole is spaced from an opening of the cavity and defining an axis of rotation. The placard system further includes a placard fastener engaged with the holder and swingable about the axis of rotation between a closed position in which the placard fastener blocks a portion of the opening of the cavity and an open position in which the placard fastener is spaced from the opening of the cavity. The placard fastener includes a planar base portion including a mounting hole, an engagement portion configured to engage the holder or the placard, and an actuation portion.