Why do I keep getting messages on my phone that my AppleID is being used?
Why do I keep getting messages on my phone that my AppleID is being used?
Being used for what?
Check your device list to see if there is a device signed in that you don't recognize. You can remove the device using the steps in the article below. As a precaution, change your password.
Apple ID device list -Check to see where you‘re signed in.
What to do after you change your Apple ID or password - Apple Support I suggest doing this before you change your Apple ID or password.