# 959
source: https://developer.mastercard.com/open-finance-us/documentation/errors/error-codes/959/index.md

This occurs when a financial institution needs additional information from the end user during an add account event.​

|             Title             |                                                                                                                                                                                                                                                                    Details                                                                                                                                                                                                                                                                     |
|-------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Aggregation Status Code**   | 959                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Remediation Category**      | Re-Authenticate or Provide Additional Information                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| **HTTP Status**               | 500                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Error Type**                | Account Error                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| **Data Connect Alert**        | To continue, please sign in to your financial institution and update the contact information. (959)                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Error Message**             | Financial institution requesting updated contact information.​                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| **Common Causes**             | This could be a prompt from the financial institution for the user to take a specific action during add account process. These prompts may include actions such as : * Updating customer's contact information before they attempt to add accounts * Accepting e-statements or new terms and conditions * Directing the user to login at the bank website etc. ​Until the end user resolves the issue, data access for certain capabilities can be limited (e.g. account owner details may not be supported) or data refresh can be impacted.​ |
| **Troubleshooting Steps**     | Data Connect display alerts will automatically prompt the end user when they are in session to take suggested remediation action associated with this error. ​ ​Best Practice: Developers may prompt the end users to log into the financial institution and take timely recommended action so that data access/refresh can be resumed.                                                                                                                                                                                                        |
| **Data Connect Fix Eligible** | No.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Retriable by End User**     | Yes, the end user needs to take specific action as prompted by the financial institution​. ​                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| **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)