The mapping: 'Fraudulent'/'Unrecognized' → Visa 10.4/MC 4837/4863 (identity evidence, 3DS shift, CE 3.0); 'Product not received' → 13.1/4855 (delivery proof); 'Product unacceptable' → 13.3 (listing + return-attempt rule); 'Subscription canceled' → 13.2 (cancellation logs); 'Credit not processed' → 13.6 (refund records); 'Duplicate' → 12.6 (both transaction records). Each network code carries specific rules the simplified label hides — the full detail lives in our reason-code reference.
The mapping table
| Shopify label | Network codes | Decisive evidence |
|---|---|---|
| Fraudulent | Visa 10.4, MC 4837, Amex F29 | 3DS result, AVS+session, delivery-to-AVS, CE 3.0 history |
| Unrecognized | MC 4863, Visa 10.4 variants | Recognition evidence: confirmation to their email, account activity |
| Product not received | Visa 13.1, MC 4855, Amex C08 | Tracking + POD to specified address, disclosed window |
| Product unacceptable | Visa 13.3, Amex C31 | Order-date listing, QC, policy display, no return attempt |
| Subscription canceled | Visa 13.2, Amex C28 | Signup terms, cancellation-log absence, post-charge usage |
| Credit not processed | Visa 13.6 | Refund transaction record, or policy-based denial trail |
| Duplicate | Visa 12.6 | Both transaction records proving distinctness |
Why the network code matters
The simplified label loses the rules: 13.3's return-attempt requirement (citable, case-winning), 10.4's liability shift on 3DS-authenticated orders (near-automatic win), CE 3.0's mandatory-acceptance provision on qualifying fraud and not-received claims. Responding to the label instead of the code means generic evidence against specific rules — the main reason DIY win rates trail automated ones.
Aurai resolves each dispute to its network code and builds against that code's evidence fields and citable rules — the mapping table above, executed automatically.
Frequently asked questions
Where do I see the real network reason code?
Shopify's dispute detail sometimes exposes network metadata; connected dispute tools read it via API. The simplified label plus dispute context usually determines it reliably.
Does the network code change my deadline?
The effective deadline is what the admin shows (7–21 days) — but the code changes what evidence wins and which rules are citable, which is the difference between generic and specific defense.
Post reflects public documentation and industry surveys as of the publish date. Win rates and other figures are indicative ranges, not guarantees and not Aurai results; outcomes vary by merchant, evidence, and issuer. Visa, Mastercard, American Express, Discover, Stripe, PayPal, and Shopify are trademarks of their respective owners; Aurai is independent and not endorsed by any of them. Network rules change — always verify current official rules before acting on any specific tactic.