For security purposes, after a period of inactivity or if you close your browser, your session on eBay will expire and you'll need to sign in again.
Have eBay keep you signed in
To save time re-entering your User ID and password, you can have your computer remember this information for one day. Your password will be saved until you sign out, even if you disconnect from the Internet, close your browser, or turn off your computer.
If you choose this option, eBay will still ask you to re-type your password to access personal or financial information.
Note:
As a safety measure, if you're using a public or shared computer, always click “Sign Out” in the upper right corner of the screen when you're finished using eBay.
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