The invention relates to a method for verifying a character to be displayed on a screen, compared to a reference character. The character to be displayed and the reference character each comprise at least several characteristic points. The method comprises: a) determining a barycenter of the characteristic points of the character to be displayed, b) computing geometric coordinates of each characteristic point of the character to be displayed in a coordinate system centered on the determined barycenter, and c) computing a deviation between the character to be displayed and the reference character, as a function of the geometric coordinates computed for the character to be displayed and predetermined geometric coordinates for the reference character. The character to be displayed is considered correct only if the computed deviation is below the predetermined threshold.