> 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-wallet-sdk-ios/implement-nfc-wallet/make-payments/implement-contactless-payment/1.-check-prerequisites.md).

# 1. Check prerequisites

### Requirements

Meet these requirements before you build and validate contactless payment:

* **Device and OS**: iOS 17.4 or later on an NFC-capable device.
* **Apple Account**: An Apple ID registered in the European Economic Area (EEA).
* **Entitlement**: Apple grants the HCE entitlement.
  * Update your Xcode project settings.
  * Update the entitlements `.plist`.
  * Update `Info.plist` to include the entitlement and required metadata.
  * For details, see **Configuring and enabling the entitlement in Xcode** in [Apple HCE entitlement](https://developer.apple.com/support/hce-transactions-in-apps/).
* **Location (testing)**:
  * For iOS 17.4 to iOS 18.1, you must be physically located in the EEA to validate contactless payment.
  * For later iOS versions, see **Testing Requirement** in [Apple HCE entitlement](https://developer.apple.com/support/hce-transactions-in-apps/).

{% hint style="warning" %}
When you submit the HCE entitlement request to Apple, include the complete list of supported AIDs.

Make sure you include the PPSE AID:

* **2PAY.SYS.DDF01** ("325041592E5359532E4444463031" in hexadecimal format)
  {% endhint %}

### Before you initiate contactless payment

#### Check contactless capability

Before you request permission, confirm the device supports contactless payment. Follow [Check contactless capability](/nfc-wallet-sdk-ios/implement-nfc-wallet/check-contactless-capability.md).

#### Request permission

Your digital wallet application must request the **Contactless & NFC** permission. The end user experience is:

<figure><img src="/files/uNpr7b5MS6s3v8VlbAkM" alt="iOS prompt for Contactless &#x26; NFC permission"><figcaption><p>iOS prompt for Contactless &#x26; NFC permission.</p></figcaption></figure>

After the prompt, the end user can manage the permission in **Settings** > **your issuer application** > **Contactless & NFC**.

Use the following code to request permission:

```swift
let contactlessPaymentSession = ContactlessPaymentSession()
do {
  try await contactlessPaymentSession.requestAuthorization()
} catch ContactlessPaymentSession.Error.permissionNotAccepted(let reason) {
  // Permission not granted.
} catch {
  // other errors due to device eligibility
}
```

{% hint style="info" %}
Request the **Contactless & NFC** permission when the end user provisions their first digital card.

If the end user rejects the permission, the issuer application cannot perform contactless payment.
{% endhint %}


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