An embossing system comprising: - an embossing unit with at least one embossing roller (G1; G2) arranged to emboss a web of paper (VI; V2) intended to be joined with a further web (V2, V1) by gluing; and - a gluing unit associated with the embossing unit, with a tank containing the glue used to perform said gluing and a glue dispensing device comprising a cliche roller adapted to distribute by contact the glue contained in the tank on one of said webs (VI, V2) while the embossing is performed, said cliche roller rotating with a pre-fixed angular velocity around an axis (x) parallel to said at least one embossing roller (G1; G2); - a sensor apt to produce electrical signals having amplitude and/or frequency related to the vibrations at whom said cliche roll is instantaneously subject, while the same rotates around said axis (x); - a control unit that during operation of the system receives instantaneous data of the amplitude and / or frequency of the signals produced by said sensor and compares them with reference data; characterized in that the reference data are contained in a file previously acquired by testing the embossing unit and the gluing unit in conditions of regular and respectively non-regular distribution of the glue on the cliche roller, said reference data being constituted by a first set of amplitude and or frequency data representative of normal vibrations and a second set of amplitude and/or frequency data representative of abnormal vibrations respectively, the control unit being programmed to generate an alarm signal if at least an instantaneous datum of amplitude and / or frequency of the signals produced by said sensor corresponds to at least a datum of amplitude and / or frequency of the second set. - an embossing unit with at least one embossing roller (G1; G2) arranged to emboss a web of paper (VI; V2) intended to be joined with a further web (V2, V1) by gluing; and - a gluing unit associated with the embossing unit, with a tank containing the glue used to perform said gluing and a glue dispensing device comprising a cliche roller adapted to distribute by contact the glue contained in the tank on one of said webs (VI, V2) while the embossing is performed, said cliche roller rotating with a pre-fixed angular velocity around an axis (x) parallel to said at least one embossing roller (G1; G2); - a sensor apt to produce electrical signals having amplitude and/or frequency related to the vibrations at whom said cliche roll is instantaneously subject, while the same rotates around said axis (x); - a control unit that during operation of the system receives instantaneous data of the amplitude and / or frequency of the signals produced by said sensor and compares them with reference data; characterized in that the reference data are contained in a file previously acquired by testing the embossing unit and the gluing unit in conditions of regular and respectively non-regular distribution of the glue on the cliche roller, said reference data being constituted by a first set of amplitude and or frequency data representative of normal vibrations and a second set of amplitude and/or frequency data representative of abnormal vibrations respectively, the control unit being programmed to generate an alarm signal if at least an instantaneous datum of amplitude and / or frequency of the signals produced by said sensor corresponds to at least a datum of amplitude and / or frequency of the second set.