Your name must be unique, and not deceptively similar, to any other trademarked name or business. It is also required that your name not be used to intentionally misrepresent the products or services you offer. For LLCs, nearly all states will also require you to add a signifier of your limited liability status, such as "LLC" or "L.L.C." to the end of your company's name. You may be able to operate under a name other than your formal LLC name by applying for and using a dba.
LLP, Limited Liability Partnership: a partnership where a partner's liability for the debts of the partnership is limited except in the case of liability for acts of professional negligence or malpractice. In some states, LLPs may only be formed for purposes of practicing a licensed profession, typically attorneys, accountants and architects. This is often the only form of limited partnership allowed for law firms (as opposed to general partnerships).
Minnesota nonprofit corporations are not required to use any of these words; for business corporations, they must use "corporation", "incorporated", or "limited", or shall contain an abbreviation of one or more of these words, or the word "company" or the abbreviation "Co." if that word or abbreviation is not immediately preceded by the word "and" or the character "&" Chapter 302A, Section 302A.115 Minnesota Statutes (for Business Corporations); Chapter 317A, Section 317A.115 Minnesota Statutes (for non-profit corporations)
Depending on elections made by the LLC and the number of members, the IRS will treat an LLC as either a corporation, partnership, or as part of the LLC’s owner’s tax return (a “disregarded entity”). Specifically, a domestic LLC with at least two members is classified as a partnership for federal income tax purposes unless it files Form 8832 and affirmatively elects to be treated as a corporation. For income tax purposes, an LLC with only one member is treated as an entity disregarded as separate from its owner, unless it files Form 8832 and elects to be treated as a corporation. However, for purposes of employment tax and certain excise taxes, an LLC with only one member is still considered a separate entity.
With the proper planning, limited liability companies can exist for generations. S-Corps continue to exist even if the owners or majority shareholders leave or pass away. C-Corps continue to exist even if the owners or majority shareholders leave or pass away. Non-Profit organizations and institutions survive after their directors leave. Sole Proprietorships do not exist when the owner quits or passes away.
All formal business entities, including LLCs, are required to have a Registered Agent on file with the state at all times. The agent may be an individual or company with a physical address located in the state of incorporation. Agents must be available at all times during standard business hours (9 a.m. - 5 p.m. Monday – Friday). The role of a Registered Agent is to receive any and all of communications from the government to the business. The agent’s name and address must be disclosed as part of the company’s public record.