If you’ve set up ApplePay on any compatible devices, you may want to check them at some point. You may also want to turn off ApplePay on your devices, if they get lost or stolen.
To do this, go to iCloud.com and click Settings. On the Settings page, the My Devices section shows all the devices that you’ve signed into iCloud with.
Each device displays an ApplePay icon if you’ve set that device up for ApplePay.
If you want to turn off ApplePay on a device, click it, and then click Remove just below ApplePay.
Even though ApplePay is quite secure, if one of your devices is lost or stolen, it’s a good idea to remove your credit card(s) from the device.