Mark the envelope and the cover letter with the type of submission. For example, Original Submission, Application to Register Permanent Residence or Adjust Status (Form I-485). Mark the envelope and the cover letter with the form number.
Immigration forms can be ordered directly from the USCIS website or via telephone through the USCIS forms request line at 1-800-870-3676.
Your letter should be addressed to the USCIS office that is responsible for your case. You can find the address on the USCIS website or by contacting the USCIS national customer service center. You should also include a clear and professional salutation, such as “Dear USCIS Officer” or “To Whom It May Concern.”
Mail your forms to the address listed on that form's webpage. You may send your forms through USPS, FedEx, DHL, or UPS. We encourage you to save a copy of your payment, along with any tracking number provided by the courier, for your records and so you can verify the status of its delivery.
2108 E. Elliot Rd. Washington, D.C. Go to our USCIS Lockbox Filing Locations Chart for Certain Family-Based Forms page for the filing address based on where you live. You can file Form I-130 online even if your relative is in the United States and will file their Form I-485 by mail.
If you need to provide additional documents after submitting your application, you must submit them at least five business days before your interview. If you filed a paper application, submit them to your local asylum office. If you filed online, upload them to your existing USCIS online account.
USCIS, through the Secure Mail Initiative (SMI), uses USPS Priority Mail with Delivery Confirmation to deliver certain immigration documents in a safe, secure, and timely manner.