What is MICR?
The long form of the second question on this page: the fonts, the read head, and what makes a printer MICR capable.
Read itThese are the questions we are asked most often, grouped by the part of the process they belong to. Every answer is written to be useful on its own, including to someone who buys from somebody else.
Where a standard or a statute decides the answer, it is named, so you can take it to your bank rather than take our word for it.

What the magnetic line is for, who writes the rules, and what the printer and the paper have to do to stay inside them.
Yes. The Federal Reserve modified Regulation CC, but the requirement itself is unchanged. Checks and substitute checks, also called image replacement documents or IRDs, are legally required to include a magnetic code line in order to be treated as a cash item for processing in the United States payment system.
MICR stands for magnetic ink character recognition, and it describes the characters along the bottom of a check. They are standardized fonts printed with ink or toner that contains magnetic material.
As checks move through processing, reader/sorter machines identify the magnetic toner and recognize each character by its magnetic strength, which translates into fields. All check fields must use MICR toner for efficient processing. Standard toner causes rejection, and fines to the issuer.
The American Bankers Association (ABA) and the American National Standards Institute (ANSI) establish MICR specifications, and the Accredited Standards Committee (ASC) X9 Financial Services reviews them periodically. We hold membership on the ASC X9B Committee on Paper Payment Systems.
Printing onto blank stock removes the expense, the inefficiency and the risk of purchasing, storing, distributing and tracking pre-printed check stock. Blank stock does not become obsolete when an address, an account number or a logo changes.
One stock also handles varied MICR applications such as loan coupons, depository transfers and starter checks, without a separate pre-printed form for each one.
A standard printer running a MICR cartridge is a risk, given how rigid MICR specifications are and the fees that follow non-compliance.
A printer built for the application is engineered around it: certified E-13B and CMC-7 fonts, a low toner warning with an automatic stop, paper tray locks, and datastream encryption. Our MICR printers also include toner we formulate ourselves and a MICR Performance Guarantee against bank-imposed fees, when they are used with approved supplies and maintenance.
Yes. ANSI X9.18, approved by the ABA, recommends 24 pound paper and specifies what the sheet has to do.
What the standard asks for
Image exchange, substitute checks, and the vocabulary a returns processing conversation runs on.
The Check Clearing for the 21st Century Act, enacted October 28, 2004. It encourages check truncation by replacing physical transport with digital imaging, which decreases processing time and transportation cost and reduces the risk of loss or destruction.
Because of Check 21, banks can transfer digital check images to processors and to paying banks. If the paying bank cannot process the electronic version, it receives a substitute check, also called an image replacement document or IRD: a paper replacement created from the electronic image of an original paper check, and the legal equivalent of the original.
An IRD must carry all front and back information, including the MICR line and the endorsements, and it must state that it is a legal copy. Institutions may store or destroy the originals after electronic capture.
They remove courier and transportation fees for sending a hard copy. Electronic transmission reduces float and speeds processing. They also let a bank serve merchant customers without a physical branch nearby.
These are the terms that come up in every returns processing conversation, in the order the items move.
The vocabulary
How the attack works, why it grew, and the measures that reduce it inside your organization and at your bank.
Check fraud costs American companies billions of dollars each year, which raises bank costs and vendor prices, and it costs victims directly through losses and reputational damage. It affects businesses of every size.
Uniform Commercial Code reforms place responsibility for prevention on the issuer, requiring due diligence and security measures.
The ABA attributes the increase to the availability of sophisticated, low-cost technology, including laser printers and desktop publishing software. Color copiers let criminals mass-produce counterfeits.
Checks are copied, the amount and the payee are altered, and the item is then cashed with false identification. Organized groups create as many as 40 to 50 bogus checks from a single copy of one good check.
Corporate payroll and accounts payable are common targets. All business types and sizes are vulnerable.
The measures divide into what you control inside your own organization and what you arrange outside it. Neither half works on its own.
Inside your organization
Outside it
The UCC sets out responsibilities for banks and companies handling check fraud. It was updated in 1993 and adopted by all 50 states, and that update moved responsibility for prevention from banks alone to businesses and corporations, requiring shared safeguards.
The long form of the second question on this page: the fonts, the read head, and what makes a printer MICR capable.
Read itField by field along the bottom of the item, including the four symbols that separate the fields.
Read itWhat ANSI X9.18 asks of the sheet, and the stock we supply for checks and for image replacement documents.
Read itPrinting image replacement documents from an electronic cash letter, which is where most of the Check 21 vocabulary lands.
Read itWhat the guarantee pays for, the conditions that apply together, and the explicit exclusion.
Read itIf your question is not here, call us. We answer MICR questions for people who are not customers, because the alternative is a bank fee somebody pays for no reason.
Tell us your monthly volume and what you are running now. That is enough for a real answer rather than a brochure.