# 187
source: https://developer.mastercard.com/open-finance-us/documentation/errors/error-codes/187/index.md

This error occurs when the end user provides inadequate response to security questions while connecting to a financial institution.

|             Title             |                                                                                                                                                                                                                                                                                                                                                       Details                                                                                                                                                                                                                                                                                                                                                       |
|-------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Aggregation Status Code**   | 187                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| **Remediation Category**      | Data Connect Fix                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| **HTTP Status**               | 500                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| **Error Type**                | Account Error                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| **Data Connect Alert**        | If [Data Connect Fix](https://developer.mastercard.com/open-finance-us/documentation/connect/generate-2-connect-url-apis/index.md) is integrated, following message will be displayed​: Your answer to the security question doesn't match this account. If this persists, sign into your bank's website to ensure access, and then try again. (187)                                                                                                                                                                                                                                                                                                                                                                |
| **Error Message**             | Missing or incorrect MFA answer. One of your security questions (for example, name of your first pet) has expired and needs to be answered.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| **Common Causes**             | * This error occurs during automated data refresh for only the accounts that have been already added or linked. * If a financial institution requires Multi-Factor Authentication (MFA) on every login, the end user is required to authenticate each time in order to receive new data. * This error will be returned if the end user either fails to provide a response, provides an incorrect response or an expired response to security questions or MFA.                                                                                                                                                                                                                                                      |
| **Troubleshooting Steps**     | * Prompt the end user to attempt to add accounts again entering the correct MFA information. If the end user continues to answer incorrectly they may need to go to their financial institution and update their MFA questions/answers and then try again. * [Data Connect Fix](https://developer.mastercard.com/open-finance-us/documentation/connect/generate-2-connect-url-apis/index.md) flow can be leveraged to enable your end users to re-authenticate. * Call [Refresh Customer Account](https://developer.mastercard.com/open-finance-us/documentation/products/manage/account-aggregation/data-refresh/index.md) and follow the MFA sequence to prompt your user to carefully re-enter the MFA response. |
| **Data Connect Fix Eligible** | * [Data Connect Fix](https://developer.mastercard.com/open-finance-us/documentation/connect/generate-2-connect-url-apis/index.md) flow can be leveraged to enable your end users to re-authenticate. This is a separate integration. To know more about [Data Connect Fix](https://developer.mastercard.com/open-finance-us/documentation/connect/generate-2-connect-url-apis/index.md), contact your account management representative. * If Data Connect Fix is already integrated, then try a refresh request. * If refresh request fails to address the issue, submit a [support ticket](https://developer.mastercard.com/open-finance-us/documentation/support/index.md#create-a-support-case-in-scm).         |
| **Retriable by End User**     | Yes, the end user will be able to resume the session, once the connection to the selected financial institution is fixed. The end user may need to make several authentication attempts to assist in resolving the error. ​                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| **Access to Latest Data**     | You will be unable to access the latest data for this user's account until the end user resolves the issue.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |

[Full Error List](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md) \| [Account Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/account-errors/index.md#aggregation-status-codes)