Viewer for determination of authenticity

An authenticity determination viewer comprising a first phase difference film, a linear polarizer, and a second phase difference film in this order, and further comprising a frame supporting the first phase difference film, the linear polarizer, and the second phase difference film, wherein

• a polarized light transmission axis of the linear polarizer and a slow axis of the first phase difference film are non-parallel to each other,
• the polarized light transmission axis of the linear polarizer and a slow axis of the second phase difference film are non-parallel to each other,
• a first description is shown in a portion of the frame that comes into the sight of a user when a front-rear direction of the authenticity determination viewer is adjusted so that a reflected light from a marking containing a cholesteric resin passes through the authenticity determination viewer,
• the first description indicates that the reflected light from the marking can pass through the authenticity determination viewer,
• a second description is shown in a portion of the frame that comes into the sight of a user when the front-rear direction of the authenticity determination viewer is adjusted so that the reflected light from the marking is blocked by the authenticity determination viewer, and
• the second description indicates that the reflected light from the marking can be blocked by the authenticity determination viewer.