family sharing
My family just started using family sharing. Now we all get each others text messages. How do I stop this?
one or more devices is logged in with the same ID to the message system
in OS X you will need to configure your messages in the message.app preferences (account) so they are not distributed to devices tied to your account that you personally don't use
for iOS devices see this docoument
Add or remove your phone number in Messages or FaceTime - Apple Support
in some instances the account may require an Apple service rep to confugure
You may contact Apple Computer by using the Contact Apple link at the bottom of this page