[header] How to get immigration papers [title] Choose a sponsor. [step] A u.s. citizen such as a close relative or an employer must fill out and file a visa petition for you. [substeps] Generally, a sponsor must be over the age of 18 and live in the u.s. or u.s. territories, either as a citizen, a u.s. national, or a lawful permanent resident. 
If you're applying for immigration because you have a job in the u.s., typically your employer would be your sponsor. Otherwise, your sponsor usually is a close relative.