Cutting hair and shaving people exposes the business to risk. Coloring hair and applying chemicals to people's heads and faces could also result in injury or illness. Therefore, these types of personal care businesses must have the proper training and licensing to operate.

Cars are a matter of public safety. Automobile mechanics who fix cars and trucks must be specifically licensed to do so. An error could result in the loss of life or devastating injuries.

Electricians work with electricity, which can cause fires and electrocution. The government requires them to be appropriately trained and licensed before they can work in the field.

Plumbers must be licensed and well-versed in local building and safety codes to ensure public health and safety. Each plumber must undergo extensive training to learn all about plumbing codes and maintenance of water and sewer systems to prevent waterborne illness and injuries.

Insurance products can be complex and confusing to the public. To ensure public confidence, insurance agents must be thoroughly trained on all the products they sell and licensed by the state to sell them. Insurance business licenses are essential to avoid scammers, maintain industry standards, and comply with federal and state laws.

There are strict laws about abusive debt collection. Collection agencies must operate without harassment, misleading practices, and unfair tactics and instead engage in ethical and legal debt recovery procedures. As a rule, collection agencies must familiarize themselves with the laws governed by the Fair Debt Collection Practices Act (FDCPA) and get licensed before collecting even one dime.

Construction companies build homes and commercial structures that people use to live and work. To preserve public safety, these buildings must comply with dozens of state, federal, and local building codes. Construction firms are subject to multiple business licenses depending on where they operate and the services/products they provide.

Due to the dangers of the business, tattoo parlors must also have a business license to operate. Using needles on people's skin is a recipe for disaster. Tattoo parlors also offer piercing services, which can lead to infection and injury.

Obviously, doctors and other people working in medicine have crucial but vulnerable jobs that could lead to injury, illness, and death. Doctors must not only be highly trained and skilled but they must also be licensed by the jurisdiction in which they want to work.

Nurses assist doctors by doing a lot of the heavy lifting, like inserting IVs, taking vitals, changing bedpans, and more. They, too, must undergo years of education, training, and on-the-job testing before they can work as nurses. They must also pass an exam and get a nursing license to practice.

Our legal system is fragile and built on integrity and ethics. Every lawyer who practices in the U.S. must be thoroughly educated and licensed (usually by the state bar) to practice law. A law license ensures public protection and verifies the attorney's competence to practice law in the state. It also prevents unqualified individuals from practicing law and harming clients.

Real estate agents and brokers must obtain the necessary licenses to protect real estate buyers and sellers and to ensure the agent acts ethically with the client's best interest at heart. A real estate license reassures the public that the agent has completed the necessary education and other requirements to practice in the field.

Building appraisers perform a necessary function by valuing residential and commercial property. The process can be complex and requires formal training, apprenticeship, and on-the-job training before an appraiser can be licensed to work independently.

Pharmaceutical companies create life-saving drugs to ease various symptoms and cure illness. These are high-risk organizations that require industry-specific licenses, education, and other requirements before they can develop drugs for public consumption.

Labs that work with dangerous substances or diseases must be licensed by the federal government or state to operate, and they must comply with strict laws to keep the public safe.

Anyone who works with or serves food must be specially licensed. Licensing for food establishments comes with strict rules and regular health department inspections. If there are too many health code violations, the place may be shut down.

Bars and package stores that sell alcohol to the public must be licensed by the city or county. A whole list of regulations affects the sale of alcohol and tobacco.