Device for testing the authenticity of a document of value or security

Device for testing the authenticity of a value or security document with - means (208, 210, 214) for measuring a signal dependent on a dielectric property of the value or security document electric signal (216) - means (218) for comparing the dependent dielectric property electrical signal with a first reference signal (222) - means (208, 210, 250, 252) for measuring a signal dependent on an electro-luminescent characteristic electrical signal (254) - means (256) for comparing the dependent from the electro-luminescent characteristic electrical signal with a second reference signal (260) and - means (208, 210) wherein the detection of the dielectric property and the electroluminescent property after switching on of the electric alternating field is performed to generate an alternating electric field to penetrate at least a portion of the value and security document and to stimulate the electroluminescence of the particles of this partial area, in parallel.