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AAP
An accredited ACH professional certified by the National Automated Clearing House Association (NACHA).
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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.
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POS (Point-of-Sale)
A one time debit entry to the account of a receiver where the entry is initiated at an electronic terminal. POS transactions are generally initiated with a...
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