Frequently asked questions about USPS
How do I track a USPS package?
Go to USPS Tracking at usps.com and enter your tracking number (found on your receipt, shipping confirmation email, or the sender's notification). You can also track packages using the free USPS Mobile app for iOS and Android, by texting your tracking number to 28777 (2USPS), or by calling 1-800-222-1811. Most USPS services — including Priority Mail, Priority Mail Express, USPS Ground Advantage, and Certified Mail — come with tracking included.
What should I do if I missed a USPS delivery?
If the carrier could not deliver your item, they will leave a PS Form 3849 ("Sorry We Missed You" notice) in your mailbox. You can then schedule a free redelivery online at usps.com/redelivery, by calling 1-800-ASK-USPS (1-800-275-8777), or by checking the appropriate box on the notice and leaving it for your carrier. You can also choose to pick up the item in person at your local Post Office — the notice will tell you which location is holding your package and how long they will keep it (usually 15 days before it is returned to sender).
How do I forward my mail when I move?
You can submit a Change of Address (COA) request online at usps.com/move for a small identity verification fee of $1.10 charged to a credit or debit card. You can also fill out PS Form 3575 at any Post Office. USPS will forward most First-Class Mail and packages to your new address for 12 months, and periodicals for 60 days. Standard Mail (marketing mail) is generally not forwarded. Submit your request at least two weeks before your move to ensure a smooth transition.
What is the difference between Priority Mail and First-Class Mail?
First-Class Mail is used for standard letters (up to 3.5 oz), large envelopes/flats (up to 13 oz), and small packages (up to 13 oz). Delivery typically takes 1 to 5 business days depending on distance. Priority Mail is designed for faster delivery of packages and thick envelopes, with an expected delivery time of 1 to 3 business days. Priority Mail includes free USPS packaging (Flat Rate boxes and envelopes), up to $100 of insurance, and USPS Tracking. Priority Mail has no weight limit for Flat Rate options. For the fastest guaranteed service, Priority Mail Express offers overnight to 2-day delivery with a money-back guarantee.
What are the weight and size limits for USPS shipments?
For domestic mail, the maximum weight is 70 lbs for all package services. Maximum combined length and girth (distance around the thickest part) is 108 inches for most services and 130 inches for USPS Ground Advantage. First-Class Mail letters must be at least 5" x 3.5" and no larger than 6.125" x 11.5" x 0.25" (up to 3.5 oz). First-Class Mail large envelopes (flats) can be up to 15" x 12" x 0.75" and weigh up to 13 oz. Items exceeding 13 oz must be sent as packages via Priority Mail, USPS Ground Advantage, or another package service.
How do I file a complaint with USPS?
You can file a complaint or submit feedback online through the USPS Customer Care Center, or by calling 1-800-ASK-USPS (1-800-275-8777). For issues with specific mail or packages, have your tracking number ready. You can also visit your local Post Office and speak with the station manager. If your issue is not resolved, you can escalate it to the USPS Office of Inspector General (OIG) at uspsoig.gov or contact the Postal Regulatory Commission (PRC) to file a formal complaint.
Do I need customs forms for international mail sent through USPS?
Yes, all international packages and most large envelopes sent through USPS require a customs declaration form. Items valued at $400 or less use the small PS Form 2976 (CN 22), while items over $400 or those requiring detailed descriptions use the larger PS Form 2976-A (CN 23). You must accurately describe the contents, declare the value, and indicate whether the shipment is a gift, commercial sample, or merchandise. You can fill out customs forms online using USPS Customs Forms Online or at the Post Office counter. Failure to include the correct customs documentation can result in delays, return, or seizure of your item.
How do I hold my mail while I am away?
USPS offers a free Hold Mail service that lets you pause delivery for 3 to 30 days. You can request a mail hold online at usps.com/holdmail, by calling 1-800-ASK-USPS, or by submitting PS Form 8076 at your local Post Office. When the hold period ends, you can choose to have all accumulated mail delivered on a specific day or pick it up in person at the Post Office. This service is ideal for vacations or business trips and helps prevent mail from piling up in your mailbox, which can be a security concern.
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