In your blog, you must not make false statements about another person or business. If you do make false statements, you most likely will be subject to a libel suit. You must understand that libel can occur in written form, visual depictions, signs and pictures. For something to be considered libel, it must harm the reputation of another person. Basically, it must be defamatory. Insulting someone or making an offensive statement about a person is not libel.
Copyright or Trademark Infringement
Do not in any way use creative work, trademarks or confidential business information in your blog. If you do, you may expose yourself to legal liability. The intellectual property law makes this illegal.
You should always respect a person’s right to privacy, and never publish another person’s private information. Even if the information you publish about someone else is accurate, you must not publish private information about a person without the person’s explicit permission. Publishing a person’s private information could result in your legal liability. Private information about a person could be the person’s sexual activities, financial difficulties, medical disorders, or medical illnesses.
If you’re being paid or compensated by a company to comment favorably about a product or service of their company, you are required by the Federal Trade Commission to disclose your relationship with the company.
If you promise to remove any defamatory content about another person made by a guest blogger at your site, you must be sure to remove it.