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One of the most common challenges immigrants face after moving to the United States is understanding the U.S. mail system. In America, most official documents are still delivered as physical mail, and a simple mistake can mean your Social Security Number (SSN), Green Card, or bank card never reaches you.
So, how does the U.S. postal system work, and what mistakes should immigrants avoid? Here are the key facts you need to know:
1. Everything Arrives by Mail in the U.S.
•Social Security Number (SSN),
•Green Card,
•Bank cards,
•Court notices,
•Rental documents…
All of these are delivered as physical letters through the USPS (United States Postal Service). That’s why having a proper, accessible mailbox is critical.
2. No Name on Your Mailbox? Your Documents Won’t Arrive
If the postal worker doesn’t see your name on the mailbox, the document will be returned as “address not found.”
👉 First thing to do after moving to the U.S.: Write your name on your mailbox.
3. Opening Someone Else’s Mail Is a Federal Crime
In the U.S., even opening another person’s mail by accident is considered a federal crime.
•It can lead to fines, a criminal record, or even jail time.
Never say, “My neighbor’s SSN was delivered to me, so I opened it.”
4. No Tracking for Many Important Documents
SSNs or Work Permits are often sent without a tracking number.
•If they get lost, you must reapply, and the process takes longer.
👉 Always check your mailbox daily.
5. Address Changes Must Be Officially Reported
When you move to a new address, you must file a Change of Address with USPS.
•This can be done online for a small fee.
•You must also notify USCIS separately.
If you don’t, your documents will keep going to your old address.
6. USPS vs. FedEx vs. UPS
•USPS: Government postal service; SSNs and Green Cards always come through here.
•FedEx / UPS: Private courier companies; they do not deliver government documents.
Also, in some apartment buildings, you may not automatically get a mailbox key—you’ll need to get it from the landlord or previous tenant. USPS won’t give you a new one.
7. Spam and Junk Mail Can Fill Your Box
Advertising mail is very common in the U.S. If your mailbox overflows, important documents can be returned.
👉 If multiple people live in your household, make sure everyone’s name is listed on the mailbox.
Final Thoughts
Small mistakes with the U.S. mail system can lead to major problems for immigrants. To avoid losing your SSN, Green Card, or bank card:
•Check your mailbox daily,
•Always update your address officially,
•Make sure your name is clearly on your mailbox.
💡 Remember: A small oversight can cause big delays in your immigration journey.