Corporations and LLCs are considered domestic only in their state of incorporation or formation. If your worksite location is in another state then you must register your business as a foreign LLC or foreign corporation – a process called “foreign qualification”. For example, if you incorporated your company in Delaware, but your worksite location is in California, you need to register your company in California by filing a request to the California Secretary of State’s office. While each state does have its own requirements, the Foreign Registration Certificate is fairly easy to obtain.