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ECI Responses

The Electronic Commerce Indicator (ECI) is a crucial value in online credit card transactions that indicates the level of security or authentication applied. It differentiates various e-commerce transactions based on whether, and how, they were authenticated. The ECI is included in the authorization request, helping issuers assess the associated risk of each transaction.

The table outlines ECI responses for various card schemes, indicating which party assumes liability in cases of chargebacks or disputes.

ECICard SchemeLiability
01MastercardCard scheme authentication, liability on card issuer
02MastercardIssuer authentication, liability on card issuer
04MastercardData-Only transaction for Mastercard, liability on merchant
00MastercardAuthentication failed, liability on merchant
06Other SchemeCard scheme authentication, liability on issuer
05Other SchemeIssuer authentication, liability on issuer
07Other SchemeData Only for Visa or Authentication failed, always with liability on the merchant

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