Banking Error Code

03 | Invalid merchant

Industry

Banking

Canonical

/banking/error-codes/03/

Last Updated

Apr 16, 2026

Summary

Response code 03 indicates the merchant or terminal is not recognized or not permitted for this transaction type.

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Hub

Guides

ISO 8583 Response Codes Explained: 00, 05, 51, 54, 91, 96 + Hard vs Soft Declines

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What This Code Means

Response code 03 indicates the merchant or terminal is not recognized or not permitted for this transaction type.

Related Codes

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