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 (T) containing the glue used to perform said gluing and a glue dispensing device (GD) comprising a cliche roller (CR) adapted to distribute by contact the glue contained in the tank (T) on one of said webs (VI, V2) while the embossing is performed, said cliche roller (CR) 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 (CR) 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 (DB) 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 (CR), 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 (T) containing the glue used to perform said gluing and a glue dispensing device (GD) comprising a cliche roller (CR) adapted to distribute by contact the glue contained in the tank (T) on one of said webs (VI, V2) while the embossing is performed, said cliche roller (CR) 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 (CR) 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 (DB) 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 (CR), 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. <EOS>