document said document comprising a support comprising printed patterns wherein said method comprises generating at least a laser pulse on said support for carbonizing at least a printed pattern application_number US 201314651028 A description in the following description well known functions or constructions by the man skilled in the art are not described in detail since they would obscure the invention in unnecessary detail fig1 is a flowchart illustrating a method 100 for personalizing an official document according to a non limited embodiment of the invention the method 100 applies to an official document comprising a support comprising printed patterns pattern ink is either a standard ink or a special ink such as an optical variable ink ovi which is an ink whose color changes with the observation angle an infrared ink or an ultraviolet ink besides the printing process is inkjet process printing offset process printing flexographic printing silkscreen printing or rainbow printing these printed patterns are for example guilloches or micro texts printed all over the support fig2 shows an example wherein printed patterns are guilloches 201 and fig3 and 4 shows an example wherein printed patters are micro characters 202 forming a micro text however printed patterns can also be micro shapes for example rectangles squares or circles moir u00e9 pattern or changing patterns it is to be noted that the printed patterns are reproduced on an area of the support or on the whole surface of the support the printed patterns are defined by their form and possibly comprise information for example an alphanumerical symbol a first step 101 of.