There’s plenty of advice out there about what items to post on your Web site, says writer Christopher Elliott. But what kinds of information should you never publish?

Posting inappropriate, confidential, or incomplete information on your site can have negative and potentially embarrassing results, Elliott says. You could lose clients, employees—even your business.

In his days as an investigative reporter, Elliott says he used to count on companies carelessly posting information that could be used in a story. His favorite: He once unearthed a confidential PowerPoint presentation on computer security that detailed how to hack into a laptop computer wirelessly. You don’t need to own a laptop to appreciate the irony in that.

Read his 12 things you should never put on your site.

Monte Enbysk