To process payments with Apple Pay on the web, you need to register and verify your domain with Apple.
- Log in to your Apple developer account at https://developer.apple.com.
- Click Certificates, Identifiers & Profiles.
The page loads and presents a menu.
- Click Merchant IDs.
- Select your merchant identifier and click Edit.
- In the Merchant Domains section, click Add Domain.
- Fill in your domain name and verify this by following the instructions.