Step 2: Create a Payment Processing Certificate

To encrypt payment information, you need to create a Payment Processing Certificate, and associate it with your Merchant ID.

  1. Log in to your Apple Developer account at
  2. Click Certificates, Identifiers & Profiles.
    The page loads and presents a menu.
  3. Click Merchant IDs.
  4. Select your merchant identifier and click Edit.
  5. In the Payment Processing Certificates section, click Create Certificate.
  6. Select No to Will payments associated with this Merchant ID be processed exclusively in China? and click Continue.
  7. Click Continue.
  8. Upload the CSR file that you received from Adyen, and press Continue.
  9. Click Download to download the .cer file and press Done.
  10. Email the .cer file to

Once support confirms that the certificate is activated, you're able to process ApplePay for in-app. For web, you also need to enable Apple Pay on the web.