Summarize this article in one sentence.
To apply for a work permit, download a copy of the official application form online, entitled "Application for Employment Authorization." Fill in the form with basic information like your name, contact information, and recent travel history. The form is available for free in PDF form at https://www.uscis.gov/i-765. Be sure to complete the application in full and to provide a signature where it is requested. An incomplete form will be returned to you. Question 16 of the I-765 form requires that you state your specific eligibility for working in the U.S. This is indicated with a letter and number combination. Read the form instructions indicated at the back to figure out what code applies to you. For instance, if you have been granted asylum in the U.S., code (a)(5) would be applicable. You must include official proof of your eligibility for a U.S. work permit along with your completed form I-765. Photocopy the relevant document or documents and staple them to your form. Never submit an original document in case your form gets lost or damaged during the application process. For example, if you apply as someone who has been granted asylum, you will have to produce a copy of the judge's order that gave you that status.

Summary:
Download and complete form I-765 from the USCIS website. Read the form instructions to determine your eligibility category. Include a photocopy of an official document that proves your eligibility.