If you close the Skype app without signing out first, you might still receive notifications. If you want to stop these notifications, you can either disable them from your Settings or sign out before you close the app.
Android (6.0+), Android tablet, iPhone and iPad
- From Chats, tap your profile picture.
- Tap Settings, tap Notifications, then you can toggle the listed notification types on or off.
Android 4.0.4 - 5.1
- From Chats, tap the menu button .
- Tap Settings, and then scroll down to Notifications to toggle the listed notification types on or off.