iMessage lets you send and receive messages across all of your iOS devices, but if family members share an Apple ID, this default feature can lead to confusion and privacy concerns. This article explains how to prevent iMessages from appearing on all devices connected to an Apple ID. These instructions apply to devices running iOS 8 and later.
How to Stop Sharing Messages Between iPhone and iPad or Mac
Multiple people can share the same Apple ID and still route iMessages to specific devices.
Go to the settings of your iPhone or iPad.
Tap Messages (in the menu on the left side of your iPad; scroll down to find Messages in your iPhone's settings).
