The Michigan Department of Treasury offers an Online New Business Registration process. This process is easy, fast, secure and convenient.Michigan law defines an option contract as "an enforceable promise not to revoke an offer. Expedited service is available for all documents for profit corporations, limited liability companies, limited partnerships, and nonprofit corporations. It's important to have a thorough understanding of the types of documents that are needed to buy or sell a business. You can file an LLC (sole proprietorship), or you can keep your name and file a DBA (Doing Business As). A business sale transaction can take several forms: (1) sale of assets, (2) sale of stock, (3) merger, ( 4) consolidation, or (5) share exchange. Ready to start a business in Michigan? Find out how to register your business, safeguard your assets, and comply with state legal requirements in our guide. Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer.