USPS bans some items outright — marijuana, gasoline, explosives — and restricts others with conditions. Lithium batteries, liquids, aerosols, and firearms each have specific rules. Publication 52 is the authoritative source.
USPS Click-N-Ship prints prepaid labels at commercial rates — up to 20% off retail — with no monthly fee. The 2024 upgrade added batch labels, Apple Pay, and a 1,000-address book. Third-party apps offer steeper discounts for high-volume shippers.
Quick answers to the most common USPS questions — tracking status meanings, delivery windows, missing packages, service selection, and customer support contacts.
USPS closes 11 federal holidays in 2026. No carrier delivery, no post office counter service. Priority Mail Express is the exception — it delivers on most holidays.
USPS targets 5 PM — in practice, carriers run to 8 PM on regular days and 9 PM during peak season. Priority Mail Express is the only service with a guaranteed delivery time.
USPS Package Intercept lets you redirect or hold a package before delivery for a fee of approximately $19.45 (2026). You only pay if it succeeds. Domestic packages with tracking only — no international, no APO.
