It's always good to be familiar with the reputation of any corporate travel company you're dealing with. To find out more about a company most corporate travel websites have an ABOUT US section which will tell a little about the organization. Government agencies also monitor the activities of corporate travel companies to ensure that the goods and services they provide are acceptable to consumers.
When you decide to purchase corporate travel online check out the CONTACT US section of the corporate travel website to ensure that you can actually contact them by phone, fax or email. Reputable firms will most certainly carry this information.
Internet Meetings Resources corporate travel to supplier directories