Can You Send Certified Mail to a PO Box?
Yes—USPS delivers certified mail to PO boxes. Most recipients get a pickup notice and sign at the counter, but Signature on File can change the pickup flow.
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Tracking
Mail tracking options, delivery confirmation, and monitoring guides.
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Electronic Return Receipt vs Green Card: Which to Choose
Compare USPS electronic return receipt and physical green card options for certified mail. Learn the cost difference, delivery times, and which works best.
How to Track Certified Mail (+ What Each Status Means)
Track certified mail using your 22-digit number on USPS.com, the mobile app, or by text. Complete guide to tracking statuses and what each one means.
Can You Track First-Class Mail? Yes, Here's How
Can you track First-Class Mail? Learn which items include tracking, add-on services like Certified Mail, and how online mailing services provide delivery visibility.
First-Class Mail Delivery Times Guide
USPS First-Class Mail delivery times by distance. Learn expected delivery windows for local, regional, and cross-country mail, plus factors that affect timing.
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