Disable the "Keep me signed in" feature
Disabling "Keep me signed in"
- Select Sign Out on any Yahoo website you're currently signed in to.
- For example, in Yahoo Mail, move your cursor over your name in the upper-right corner, then select Sign Out.
- The next time you sign in to Yahoo, uncheck the box next to "Keep me signed in."
- Enter your Yahoo ID and password.
- Select Sign In.
The next time you sign in, the box will remain unchecked.
Good to know: Clearing your browser's cookies will recheck the "Keep me signed in" box.