alt

Important information

Please be advised that there will be a scheduled downtime across our API network on November 05 and November 07, 2024. For more information, visit our platform status portal.:
- Scheduled maintenance on November 5, 2024
- Scheduled maintenance on November 7, 2024

Unzer

Merchant Advice Error Codes

Learn about various response codes and categories for card authorization reattempts.

Visa and Mastercard introduced new rules about handling reattempts for declined transactions. Following these rules will help you to avoid additional fees and to reduce the number of unsuccessful reattempts. The appropriate rules apply for the error codes summarized in the following two categories:

Error codeCategory
COR.800.100.151
COR.800.100.152
COR.800.100.156
COR.800.100.159
COR.800.100.167
COR.800.100.171
COR.800.100.172
COR.800.100.177
Category 1 - Do not retry**
COR.800.100.153
COR.800.100.157
COR.800.100.162
COR.800.100.168
COR.800.100.190
COR.800.100.500
COR.800.100.600
COR.800.100.650
Category 2 - retry* max 10 times

*Retry: A retry is a combination of merchant, amount, PAN, and expiry dates. A retry time span is a 30-day period starting from the first decline.

**Do not retry implies permanently.