The signature (or logo) on the check is fuzzy.

Our recommendation is to scan the signature (or logo) at the same size it will print on the check. Sometimes this requires re-doing the original physical signature (or logo) and re-scanning. Crop off all the extra white space. This can be done in Paint. You want to avoid scaling the image if possible. Mekorma MICR should print the image at the same resolution as it prints out of Microsoft® Paint.