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Immigration
Immigration mailing guides
Step-by-step instructions for mailing USCIS forms and related paperwork. Use these when you need to send a complete packet to a lockbox or field office.
Published Jan 16, 2026 • Updated Jan 21, 2026
What to include in an immigration packet
- Completed forms and signatures
- Supporting evidence (copies of IDs, records, or notices)
- A cover letter summarizing contents
- Any required checks or money orders (not included with PostalForm)
How it works with PostalForm
- Combine documents into one PDF
- Add sender and recipient addresses
- Checkout and we print + mail it via USPS
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Ready to send it?
Upload your packet and we will mail it.