> For the complete documentation index, see [llms.txt](https://developer.paddle.com/llms.txt).

# Payment method is unknown

Your request includes a payment method that Paddle doesn't recognize.

---

## Example

```json
{
  "error": {
    "type": "request_error",
    "code": "checkout_payment_method_unknown",
    "detail": "Unknown payment method.",
    "documentation_url": "https://developer.paddle.com/errors/checkout_payment_methods/checkout_payment_method_unknown"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}
```

## Details

| Attribute | Value |
| --- | --- |
| Status code | 400 |
| Error code | `checkout_payment_method_unknown` |
| Error message | Unknown payment method. |

## Common causes

- The request includes a payment method key that Paddle doesn't recognize, like a misspelled key.

## Common solutions

- Use only the payment method keys returned by [Get checkout payment method settings](https://developer.paddle.com/api-reference/settings/get-checkout-payment-method-settings).