What not to wear on an interview

A client asked my advice on what to wear for a Web Interview as he planned to wear his usual suit and tie as he would have for in in-person interview but thought he would check it out. I suggested he ask the HR contact at the company. The HR contact replied, "We are a casual 'no suits allowed' organization so please feel free to dress in business casual attire.” My client and I were both glad he checked with HR.