# `Stripe.Params.TestHelpers.ConfirmationTokenCreateParams.PaymentMethodData.Ideal`
[🔗](https://github.com/jeffhuen/tiger_stripe/blob/main/lib/stripe/params/test_helpers/confirmation_token_create_params.ex#L313)

Nested parameters.

# `t`

```elixir
@type t() ::
  %Stripe.Params.TestHelpers.ConfirmationTokenCreateParams.PaymentMethodData.Ideal{
    bank: String.t() | nil
  }
```

* `bank` - The customer's bank. Only use this parameter for existing customers. Don't use it for new customers. Possible values: `abn_amro`, `adyen`, `asn_bank`, `bunq`, `buut`, `finom`, `handelsbanken`, `ing`, `knab`, `mollie`, `moneyou`, `n26`, `nn`, `rabobank`, `regiobank`, `revolut`, `sns_bank`, `triodos_bank`, `van_lanschot`, `yoursafe`. Max length: 5000.

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*Consult [api-reference.md](api-reference.md) for complete listing*