# `Stripe.Params.TestHelpers.Issuing.AuthorizationCreateParams.RiskAssessment.CardTestingRisk`
[🔗](https://github.com/jeffhuen/tiger_stripe/blob/main/lib/stripe/params/test_helpers/issuing/authorization_create_params.ex#L255)

Nested parameters.

# `t`

```elixir
@type t() ::
  %Stripe.Params.TestHelpers.Issuing.AuthorizationCreateParams.RiskAssessment.CardTestingRisk{
    invalid_account_number_decline_rate_past_hour: integer() | nil,
    invalid_credentials_decline_rate_past_hour: integer() | nil,
    level: String.t() | nil
  }
```

* `invalid_account_number_decline_rate_past_hour` - The % of declines due to a card number not existing in the past hour, taking place at the same merchant. Higher rates correspond to a greater probability of card testing activity, meaning bad actors may be attempting different card number combinations to guess a correct one. Takes on values between 0 and 100.
* `invalid_credentials_decline_rate_past_hour` - The % of declines due to incorrect verification data (like CVV or expiry) in the past hour, taking place at the same merchant. Higher rates correspond to a greater probability of bad actors attempting to utilize valid card credentials at merchants with verification requirements. Takes on values between 0 and 100.
* `level` - The likelihood that this authorization is associated with card testing activity. This is assessed by evaluating decline activity over the last hour. Possible values: `elevated`, `highest`, `low`, `normal`, `not_assessed`, `unknown`.

---

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