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Business Checks > What It Means for RDFIs

The NACHA Operating Rules clarify the check conversion process for business checks. They also provide a Return Reason Code (R39) so that you can easily return ineligible Items converted to ARC, POP, and BOC,

See the detailed list of checks that cannot be converted under ARC, POP, and BOC.

To Post or Not to Post?

Checks that can be converted under ARC, POP, and BOC include:

  • Checks that are 6 inches in length.
  • Checks longer than 6 inches WITHOUT the Auxiliary On-Us field.
  • Checks in the amount of $25,000 or less.

If the consumer or business has contacted the Originator to opt out of check conversion, the check CANNOT be converted.

View frequently asked questions about identifying business checks ineligible for conversion »

Return Reason Code: R39

  • R39 indicates Improper Source Document, and can be used if the originator converts an ineligible item.
  • RDFIs will have 2 banking days from the settlement date to return the item.

RDFI Responsibilities

  • Return Ineligible source documents as one of the following: R39, R20, R10.
  • Post ARC, POP, and BOC transactions on business account periodic statements.
  • Educate and inform business customers about check conversion rules.

Gain access to the full RDFI training presentation »

Rules Questions?

Do you have a question about the NACHA rule related to business checks?