This error is thrown when the credentials do not pass the validation rules. When this occurs TrueLayer stops the request and will not attempt to authenticate. Each bank has a different set of validation rules for credentials.
Still having problems…
- Check the credential validation rules with the provider you are trying to connect with.
- Check what authorisation method is being used. Currently we do not support PINsentry logins.
Have a look at our comprehensive list of the authentication error descriptions in our .