We highly suggest sending signatures via the U.S. Post Office on clean white paper in black ink to get the best results. Submissions sent via email must be no lower than 600 dpi (dots per inch) in order to ensure a good quality stamp. Files sent via email need to be in tiff or jpeg format, preferably reduced to 1-bit (black and white). We will reduce or enlarge the signature to fit the mount of your choice at no additional cost.