Please print a solid, dark MICR check if it’s refillable. If the printing is solid and perfect, you may refill it one or more times yourself. As long as the printing remains solid and perfect, you can refill it and install a new chip to print a check. If there are lines or if the printing quality is poor, the check will not be readable by the check reader. In this case, please stop printing checks and Please purchasing a new cartridge .