An Illinois Letter to Employer is a document issued by the State of Illinois that provides employers with information regarding the rights and responsibilities of employees in the state of Illinois. It outlines the legal requirements for employers to meet in order to comply with state laws and regulations. It may also provide information on state-specific employee benefits, labor standards, minimum wage, and other topics. There are two types of Illinois Letter to Employer: the standard letter and the customized letter. The standard letter is a generic document that can be used as a template, while the customized letter is tailored to the specific needs of the employer. Both letters contain important information about the employee's rights and responsibilities under Illinois law.