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

  • Corporate Trade Exchange (CTX)

    A corporate trade exchange (CTX) is a system used by corporations and agencies of the government for monetary transfer. They are primarily used to pay trading partners...

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  • RCK (Re-presented Check)

    An additional presentment of an eligible returned paper check through the ACH network.

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