Registration ensures that the business name cannot be legally used by another business. The more you use the registered name and become known to the public by name, the more legal protection your name earns against "predatory encroachment" by other businesses. Registration is required so that a comprehensive state registry of all business and corporate information is available for public reference. This information is vital to an orderly legal system and marketplace.
Without it, the public or other businesses may have no way of knowing the persons with whom they are doing business. In addition, registration is required by law to provide public notice as to who owns or stands behind a business entity. You cannot file a lawsuit in court as a business if your business is not registered. Registration enables careful business people to verify information about companies with whom they do business.