Accountable sources sign their stories and take personal responsibility for the content.
Articles should have bylines (the names of the authors). An individual or group of individuals take personal and professional responsibility for the accuracy of the information in the article. Lack of a byline is a red flag indicating suspect content.
Click on the byline if it's linked. Where does it lead?
Google the author names. Is there a LinkedIn profile? some other form of biographical information? What has the author done in the past? Does the author's background and experience qualify her or him to write on the article topic?