Tips & Tricks: Keep iCloud Secure
Remove credit and debit cards from Wallet
iCloud will sync your debit and credit cards across any devices that are logged in. This is so that you can use them with Apple Pay or in Safari. You’ll want to remove them from the devices that you no longer have access to but are authenticated with your card.
Card information is stored on any device with an Apple Pay logo next to it. Click ‘Remove All’ under the Apple Pay section of the device to remove it.
Sign out of all browsers
You need to remember to log out if you’re logging into iCloud on a shared computer, such as at work or in a library. Also try to remember not to save any passwords in the browser.
You can log out remotely – just log in, got to seettings and click on ‘Sign Out Of All Browsers’.