If you notice changes in your account settings that you did not make—such as forwarding emails to an unknown address, changes to your recovery information, or altered security settings—it's likely your account has been hacked.

You've signed up for 2-Step Verification If you use 2-Step Verification, you've elected to get a verification code by text when you sign in. This code adds an extra layer of security to your account. Learn more about 2-Step Verification.

Your account may be disabled if you provided a date of birth that does not meet the minimum age requirements to own a Google Account. If you incorrectly entered your date of birth and your account has been disabled, learn how to re-enable your Google Account.

Sometimes you'll see a "Password incorrect" error when you sign in to Google with a third-party app, like Apple's Mail app, Mozilla Thunderbird, or Microsoft Outlook. If you've entered your password correctly but you're still getting the error, you might need to update the app or use a more secure app.