# AVS check testing

You can simulate various outcomes for [Address Verification Service (AVS)](https://www.checkout.com/docs/business-operations/prevent-fraud/address-verification-service.md) checks. Just include any of the following values in `address_line1` of `billing_address` in a payment request, along with a value in `zip`.

> **Information**
>
> You must provide values for both `source.billing_address.address_line1` and `source.billing_address.zip` for AVS check testing to work.
>
> Providing any valid value in the `source.billing_address.address_line1` will result in a valid `address`.

| Address line 1 | AVS check | Description |
| --- | --- | --- |
| `Test_A` | `A` | Street Match |
| `Test_N` | `N` | No Address Match |
| `Test_R` | `R` | AVS Not Available |
| `Test_U` | `U` | Match Not Capable |
| `Test_Y` | `Y` | Street and 5 Digit Postal Match |
| `Test_Z` | `Z` | 5 Digit Postal Match |
| `Test_AE1` | `AE1` | Cardholder Name Incorrect but Postal/ZIP Match (Amex Only) |
| `Test_AE2` | `AE2` | Cardholder Name Incorrect, but Street and Postal/ZIP Match (Amex Only) |
| `Test_AE3` | `AE3` | Cardholder Name Incorrect, but Street Match (Amex Only) |
| `Test_AE4` | `AE4` | Cardholder Name Match (Amex Only) |
| `Test_AE5` | `AE5` | Cardholder Name and Postal/ZIP Match (Amex Only) |
| `Test_AE6` | `AE6` | Cardholder Name, Street and Postal/ZIP Match (Amex Only) |
| `Test_AE7` | `AE7` | Cardholder Name and Street Match (Amex Only) |