Why has my authentication request failed with "validation_error"?
Because the credentials of the end-user do not meet the credential rules as set by specific banks. TrueLayer will not attempt to authenticate if the validation_error is thrown.
Still having problems?
- Check the end user has not changed their credentials since authentication. The end user will have to re-authenticate.
- Check end users credentials by getting them to log into the banks portal.
If you need more information...
Have a look at our comprehensive list of the Data API error descriptions in our.