Verification device to verify at least the type of a closed receptacle and the correct positioning of said receptacle in a machine at least for the automatic delivery of at least a fluid product in said receptacle, characterized in that it comprises: - a loading plate for said receptacle, the loading plate being provided with a plurality of housing and centering seatings in order to center said receptacle, of decreasing sizes from the periphery toward the center; - rotation means able to determine a rotation of said loading plate around its vertical central axis of symmetry; - position sensor means (61, 62) comprising at least two position sensors (61, 62) disposed in fixed positions on diametrically opposite sides with respect to the vertical axis Z1, just above the loading plate 26, said position sensors (61, 62) being suitable to detect the position and verify the centering of the receptacle disposed on the loading plate and to transmit a relative signal, said position sensor (61, 62) being suitable at least to measure the distance between the walls of the receptacle which, on each occasion, arrives facing said position sensor (61, 62) during the rotation and said position sensor (61, 62), in order to determine at least a profile or shape of the receptacle, the volume of the receptacle, understood as the external geometric shape of the receptacle, being completely read and determined by the position sensor means (61, 62); - control means able to coordinate the functioning both of the rotation means and also of the position sensor (61, 62) in order to derive, from the signals received from said position sensor (61, 62), at least the actual shape and position of the receptacle disposed on the loading plate and to carry out a comparison between the signals received from the position sensor (61, 62) and information relating at least to the expected shape and position of the receptacle and relating to its content pre-loaded by the user on each occasion and/or found automatically in order to selectively command subsequent work steps on the basis of the result of said comparison; - electronic reading means, controlled by the control means, to read an identification code bearing information relating to the receptacle and its content, applied on said receptacle. - a loading plate for said receptacle, the loading plate being provided with a plurality of housing and centering seatings in order to center said receptacle, of decreasing sizes from the periphery toward the center; - rotation means able to determine a rotation of said loading plate around its vertical central axis of symmetry; - position sensor means (61, 62) comprising at least two position sensors (61, 62) disposed in fixed positions on diametrically opposite sides with respect to the vertical axis Z1, just above the loading plate 26, said position sensors (61, 62) being suitable to detect the position and verify the centering of the receptacle disposed on the loading plate and to transmit a relative signal, said position sensor (61, 62) being suitable at least to measure the distance between the walls of the receptacle which, on each occasion, arrives facing said position sensor (61, 62) during the rotation and said position sensor (61, 62), in order to determine at least a profile or shape of the receptacle, the volume of the receptacle, understood as the external geometric shape of the receptacle, being completely read and determined by the position sensor means (61, 62); - control means able to coordinate the functioning both of the rotation means and also of the position sensor (61, 62) in order to derive, from the signals received from said position sensor (61, 62), at least the actual shape and position of the receptacle disposed on the loading plate and to carry out a comparison between the signals received from the position sensor (61, 62) and information relating at least to the expected shape and position of the receptacle and relating to its content pre-loaded by the user on each occasion and/or found automatically in order to selectively command subsequent work steps on the basis of the result of said comparison; - electronic reading means, controlled by the control means, to read an identification code bearing information relating to the receptacle and its content, applied on said receptacle.