Declaring an Apple Pay merchant ID in the Expert Back Office

Sign in to the Back Office
Click Other actions to access your Expert Back Office.
Go to Settings > Company > Merchant IDs
Click Create a Merchant ID (MID).
The Creation of an Apple Pay Merchant ID dialog box appears. Merchant ID types are displayed as icons.
Select Apple Pay.
The merchant ID creation assistant opens.
Select the MERCHANT ID type.
Enter your Apple Pay merchant ID that you obtained when signing up for Apple Pay Developer.
Click Next to continue the process.
The rest of the setting is displayed.

The e-commerce box is enabled by default since it is the only type of payment allowed.
Enter the Minimum amount and Maximum amount authorized during a payment if you want to define thresholds and/or payment caps.
The Apple Pay payment method is selected by default.
Click Finish.
When the Association of the Merchant ID (MID) window appears, check the shop(s) to associate with this contract.

If you are unable to associate the contract with your shop, contact sales administration for checking your offer.

All that remains is for you to follow the following procedure to finalize the definition of your contract.