Auxiliary On-Us Field

Auxiliary On-Us Field

A field on the magnetic ink character recognition (MICR) line of a check or share draft. This is an optional field that can be found to the left of the routing number. The presence of this field makes the check in-eligible to be used as a source document for accounts receivable conversion (ARC), back office conversion (BOC), and point-of-purchase (POP) entries.

Related Terms

  • ACH Debit

    An ACH debit occurs when the receiver’s account is debited.

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  • MTE (Machine Transfer Entry)

    An entry initiated at an electronic terminal, such as an automated teller machine (ATM). This entry can either be a debit or a credit.

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