This article outlines some common issues that an end-user may run into with MFA in Plaid Link and recommended troubleshooting steps for these issues.
User not receiving MFA code
Plaid supports one-time MFA access codes for a select number of institutions. These institutions will send an access code via SMS or email, and these codes must be entered in Plaid Link to complete the authentication process.
If a user does not receive the access code, most likely, the contact information their institution has on file is outdated. To resolve this, instruct them to check the phone number and email on file with their institution and have them update these details if needed. Once their contact information has been updated, have them go through the Plaid Link flow again. If the code continues to fail to send, please open a case through the Plaid Dashboard.
MFA_NOT_SUPPORTED error is returned when an institution requires a form of MFA that Plaid does not support. Users with unsupported MFA are rare, and we are continually working to support all possible MFA types. While we never recommend that users adjust their security settings, in some cases, users may be able to disable the unsupported MFA type, enabling them to authenticate through Plaid.