Discover · Cardholder Disputes

Discover Reason Code NC: Not Classified

Updated November 6, 2026 · Part of the Discover reason code guide

Discover reason code NC, Not Classified, is used when a cardholder dispute doesn't fit any of Discover's specific codes. The code itself tells you little, so read the cardholder's stated claim in the dispute documentation, then answer that claim directly with order, delivery, policy and communication evidence.

What Discover reason code NC means

NC is Discover’s catch-all cardholder dispute code. The issuer uses it when the cardholder’s complaint doesn’t fit any of Discover’s specific codes for non-receipt, quality, recurring billing, duplicates and so on.

That means the code alone doesn’t tell you what the cardholder is claiming. The useful information is in the dispute documentation: the cardholder’s own explanation, and any notes the issuer added. Read that before you gather evidence.

Common causes

  • Complaints that mix several issues, such as a late, partial and partly defective order
  • Disputes over terms of service, contract length or cancellation fees
  • Service disputes that don’t map neatly to non-receipt or quality
  • Cases where the issuer simply didn’t pick a more specific code

How to read an NC dispute

Translate the cardholder’s statement into the closest specific claim, then build your response as if it carried that code:

If the cardholder says… Treat it like Lead evidence
“It never arrived” or “service never happened” RG Tracking, delivery or access records
“It was broken / not what was described” RM Listing, fulfillment proof, return policy
“I was promised a refund” RN2 Refund record or return status
“I don’t know this charge” AA Transaction identification, descriptor
“I cancelled” AP Terms, cancellation log

Evidence for an NC dispute

  1. The order record: what was bought, when, for how much, by whom.
  2. Evidence matching the actual claim: use the table above.
  3. Terms the cardholder accepted: service agreement, refund and cancellation policy, with proof of acceptance.
  4. Full communication history: every support exchange, which often reveals what the cardholder really wants.
  5. A short, direct rebuttal that restates the cardholder’s claim in one sentence and answers it point by point.

How to prevent NC chargebacks

  • Write clear terms for services and custom work, and capture acceptance at checkout.
  • Respond to complaints quickly, before the customer decides the bank is easier.
  • Log every customer interaction so you have a complete history when a vague dispute arrives.

Should you fight or accept?

Fight when the cardholder’s actual complaint is one your evidence answers: delivery was made, the terms were accepted, or a refund was already processed.

Accept when the complaint is reasonable and you can’t document your side, or when the amount is small and the evidence is thin. See should you fight small chargebacks.

Frequently asked questions

What is Discover reason code NC?
Discover reason code NC, Not Classified, is a catch-all cardholder dispute code. Issuers use it when the cardholder's complaint doesn't match any of Discover's more specific reason codes.
How do I respond to a Discover NC chargeback?
Read the cardholder's explanation in the dispute details, identify what they are actually claiming (non-receipt, quality, billing error or something else), and respond with the evidence you would use for that specific claim.
Can I challenge the use of code NC?
If the claim clearly fits a specific Discover code, you can point that out in your response, but focus on the substance. Issuers decide on whether your evidence answers the complaint, not on the label.

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