The Illinois Notice of Filing is a document filed with the Illinois Secretary of State to alert the public of the filing of certain documents. This document must be filed with the Secretary of State for most major business transactions, such as amending articles of incorporation, changing the name of the company, and issuing additional shares of stock. There are two types of Illinois Notice of Filing: (1) the Short Form Notice of Filing and (2) the Long Form Notice of Filing. The Short Form Notice of Filing is used for simple amendments to articles of incorporation, such as changing the company name or address. The Long Form Notice of Filing is needed for more complex amendments, such as issuing new shares of stock or changing the company’s structure. The Illinois Notice of Filing must be filed within 10 days of the date of the document to be effective.