Card-Present (CP) vs. Card-Not-Present (CNP)
In payment processing, chargeback liability determines whether the merchant or the card-issuing bank bears the financial loss when a fraudulent transaction occurs.
Card-Present (CP) Chargeback Liability
Card-Present transactions occur when the physical payment card is scanned, dipped, or tapped at a physical terminal.
The EMV Liability Shift Rule
Historically, issuers held most of the fraud risk. However, with the introduction of EMV chip technology, liability shifts to the party utilizing the lesser security standard:
- Issuer Liability: If the merchant uses an EMV-compliant chip reader and a customer uses an EMV chip card, the card issuer is liable for counterfeit fraud.
- Merchant Liability: If the merchant fallback-swipes a chip card on a magnetic stripe terminal or lacks an EMV chip reader, the merchant assumes full liability for the fraud.
Card-Not-Present (CNP) Chargeback Liability
Card-Not-Present transactions cover e-commerce, phone orders, mail orders, and mobile apps where the card is not physically handled by a merchant terminal.
The Baseline Merchant Risk
By default, the merchant carries 100% of the chargeback liability for fraud in CNP environments because they cannot physically verify the cardholder's identity.
The 3D Secure (3DS) Liability Shift Exception
To mitigate this risk, merchants can use advanced digital authentication protocols like 3D Secure 2 (3DS2).
- Issuer Liability Shift: If a merchant successfully routes a CNP transaction through 3D Secure and the transaction is authenticated or the attempt is approved, fraud liability shifts entirely back to the card issuer.
- Exclusions: The 3DS liability shift only protects against fraud-related chargebacks (e.g., unauthorized card use). Merchants remain liable for service-related disputes like "item not received" or "product not as described."
Direct Summary Matrix
| Transaction Category | Scenario / Protocol Implemented | Party Liable for Fraud Chargebacks |
|---|---|---|
| Card-Present (CP) | EMV Chip Card EMV-Compliant Chip Reader | Card Issuer |
| Card-Present (CP) | EMV Chip Card Swiped Magnetic Stripe Terminal | Merchant |
| Card-Not-Present (CNP) | Standard E-commerce Checkout (No 3DS Authentication) | Merchant |
| Card-Not-Present (CNP) | Successful 3D Secure (3DS / 3DS2) Authentication | Card Issuer |
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