The parole package must contain: 1st page - Cover letter, Be sure to indicate: "Parole Review Plan" The inmate's name and the inmate's federal or state number. A cover letter has two 2 advantages. First, it's a nice document that a USCIS officer can receive when opening a package. This allows the agent to quickly see a snapshot of the case. Second, the cover letter forces the applicant to review what they are sending. If something important is missing, check out the USCIS cover letter template, tips for writing your USCIS cover letter. When writing a USCIS cover letter, be sure to type your letter in English on a computer. Keep your letter concise and include only necessary information. A long cover letter will not be as helpful to a USCIS officer as a brief letter. If possible, limit your letter to one page.