I think its `bank_name`, not `bank_account_name`. 
```json
{
      "routing_number": "321171184",
      "bank_name": "CITIBANK  FSB",
      "account_type": "checking",
      "name": "T C",
      "links": {
        "customer": "XXX",
        "bank_account_verification": null
      },
      "can_credit": true,
...
}
```