Disadvantages of magnetic ink character recognition?

Answer 1

Magnetic Ink Character Recognition, or MICR, is a widely used method for printing checks, especially in the North America. It uses a special ink with a high content of iron particles to print characters that are then magnetized by a MICR reading machine. This adds an increased level of security to the checks, because it's very hard to counterfeit this kind of print. MICR, however, has some downside