MICR stands for Magnetic Ink Character Recognition. It’s a special toner that is used for printing characters at the bottom of a check or for other negotiable papers.
Printing checks with MICR is important as Federal Reserve requires checks to be printed with MICR toner. The risk of check rejection increases if they are printed with normal toner or ink.
MICR printing is important for better customer service as it decreases the chances of check rejection. MICR also eliminates any chances of check fraud.
All of the best printers for check printing lister here come bundeled with MICR ink.