Once an employee is allowed to begin work in the United States, all U.S. employers must ensure proper completion of Form I-9 for every single individual they hire for employment in the United States.  This includes citizens and non-citizens.  Both employees and employers must complete the form. On the form, the employee attests to his/her employment authorization.  The employer holds the burden of determining if the eligibility and identity documents appear genuine. 

There is a Form I-9 available in Spanish, however, it may only be completed by employers and employees in Puerto Rico.  All other employers and employees throughout the U.S. and its territories may only use the Spanish version as a reference.  They are required to print the form in English to meet employment eligibility verification requirements.