States employers must complete and retain a Form I-9 for each
individual they hire for employment in the United States. This
includes citizens and noncitizens. On the form, the employer must
examine the employment eligibility and identity document(s) an
employee presents to determine whether the document(s) reasonably
appear to be genuine and relate to the individual and record the
document information on the Form I-9. The list of acceptable documents
can be found on the last page of the form.