Yes, at Gardaland Park it is possible to request a stamp that certifies a Guest's height, in order to reduce the number of height measurements taken throughout the day.
The service is available at the attraction with the corresponding height restriction: for example, if you want to request a stamp certifying that the Guest is at least 105 cm tall, you must go to an attraction that has a minimum height requirement of 105 cm.
Please note that, regardless of the application of the stamp, the attraction staff are authorized to perform the measurement again if there are any doubts.