> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/nfc-payment/implement-nfc-payment/manage-digital-card/manage-default-card.md).

# Manage default card

### Overview

Set a default card before the end user can make a payment.

{% hint style="info" %}
Only one card can be set as the default card at a time.
{% endhint %}

### SDK

#### Set default card

{% tabs %}
{% tab title="Android Java" %}

```java
D1PayWallet d1PayWallet = d1Task.getD1PayWallet();
String d1CardID = "";
d1PayWallet.setDefaultPaymentDigitalCard(
        d1CardID,
        new D1Task.Callback<Void>() {
            @Override
            public void onSuccess(Void ignored) { }

            @Override
            public void onError(@NonNull D1Exception exception) {
                // Refer to D1 SDK Integration – Error Management section
                // Common error: invalid d1CardID
            }
});
```

{% endtab %}
{% endtabs %}

#### Get default card

{% hint style="info" %}
If no default card is set, `getDefaultPaymentDigitalCard` returns `null`.
{% endhint %}

{% tabs %}
{% tab title="Android Java" %}

```java
D1PayWallet d1PayWallet = d1Task.getD1PayWallet();
String d1CardID = "";
d1PayWallet.getDefaultPaymentDigitalCard(
        new D1Task.Callback<String>() {
            @Override
            public void onSuccess(@Nullable String d1CardID) {
                if (d1CardID != null) {
                    // call d1PayWallet.getDigitalCard to retrieve the details
                }
            }

            @Override
            public void onError(@NonNull D1Exception exception) {
                // Refer to D1 SDK Integration – Error Management section
            }
});
```

{% endtab %}
{% endtabs %}

#### Unset default card

{% tabs %}
{% tab title="Android Java" %}

```java
D1PayWallet d1PayWallet = d1Task.getD1PayWallet();
d1PayWallet.unsetDefaultPaymentDigitalCard(
        new D1Task.Callback<Void>() {
            @Override
            public void onSuccess(Void ignored) {
                // the default card is unset
            }

            @Override
            public void onError(@NonNull D1Exception exception) {
                // Refer to D1 SDK Integration – Error Management section
                // Common error: there is no default card.
            }
});
```

{% endtab %}
{% endtabs %}


---

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