Section 3: MICR Check Design

Routing Field Positions 43 to 33

The routing field is bounded by Transit Symbols (:) in positions 43 and 33. It

contains fixed format information about the drawee institution. Consult with your bank for the specific data field to be placed here for each of your accounts.

On-Us Field Positions 32 to 14

The On-us field contains the makers’ account number. The structure and content of this field is left to the drawee bank. On personal checks this field also contains the check serial numbers. The On-Us field may not consist of more than 19 characters. An On-Us (;) symbol must appear immediately to the right of the account number.

Blank Field

Position 13

Position 13 is always left blank.

Amount Field

Positions 1 to 12

The amount field is the right most field in the MICR line. It remains blank until it is printed by the bank of first deposit. When the check enters the banking system, the bank of first deposit encodes this field from data in the convenience amount field. It will be bounded by Amount Symbols (/).

Secure MICR Printer User’s Guide July 2003

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Source Technologies 1352 MICR 40 manual Routing Field Positions 43 to, On-Us Field Positions 32 to