The Immigration and Naturalization Service has been mandated to oversee, among other things, employment of undocumented aliens. Regulations mandate that all employers maintain a form I-9 for each employee, indicating the employee's immigration status. Generally these documents are kept with a Human Resources file. If the form I-9's are kept separate from other employment documents, does the INS have the mandate to search those other documents and why? If you can also possibly add any references . I understand what the INS is mostly, And I understand the background on I-9's , however , I'm still pretty confused on what they have a right to and don't