Apple made sure your transactions were safe and sound with Apple Pay. First and foremost, you need to confirm every payment with Face ID, Touch ID, and/or passcode. Second, Apple uses unique transaction identifiers and device-specific numbers to make sure payment details are stored on your device or shared with merchants.
Regarding destinations, you can use Apple Pay in any country on this list. As to the places, look for the Apple Pay logo and contactless symbol to ensure they accept Apple Pay. Finally, you can use your PayDo card with Apple Pay online and offline.
First, open the Wallet app on your iPhone. Second, tap the Add Card button and select Debit or Credit Card. Third, position your PayDo card in the camera frame or enter the card details manually. Finally, follow the on-screen instructions.