In order to set up and use Apple Pay, you must be at least 18, living in the United States, have an iPhone or iPad running 11. 2 or later or an Apple Watch running watchOS 4. 2 or later, have two-factor authentication set up with your Apple ID, and a bank debit card added to Apple Pay.
If you’re accepting payments as a business, you have to have a contactless payment-capable point-of-sale terminal, a merchant account provider or Independent Sales Organizations (ISO), a payment processor, a merchant ID (MID) or merchant account number, and a way to contact your merchant account provider. [2] X Research source
You have accepted the Apple Pay transaction and your customer will have a copy of the receipt in their Wallet.