How we check things
Correctly Addressed exists because USPS Publication 28 runs over 200 pages and nobody wants to read it just to know where a stamp goes. Here's exactly how we turn it into guides you can trust, and who's doing the checking.
Every postal rule on this site is checked against USPS Publication 28, the document the Postal Service writes for professional mailers. When a page says the bottom strip of the envelope has to stay clear, that is not a tip someone heard once. It is a measurement from the manual.
For addresses we are not sure about, we check them with our own ZIP Code Lookup tool, the same one you can use before mailing anything important.
Etiquette is different. There is no manual, and the old books disagree with each other. Where a rule is about manners rather than machines, the page says so plainly and tells you what most people do now.
Every page shows the date it was last checked. When the Postal Service changes a rate or a rule, the pages that mention it get updated and the date moves.
Who researches and writes these guides
Claire Post writes and reviews the guides on this site. She's a postal communications researcher and technical writer specializing in mailing standards, addressing conventions, and postal compliance. For over a decade, she has researched USPS regulations, international mailing requirements, and formal correspondence etiquette, and her work here focuses on turning those often-dense rules into practical, easy-to-follow guides for individuals, businesses, and organizations.
Every guide Claire writes or reviews is checked against USPS Publication 28 directly, not against other blogs or forum answers. Where a rule is about etiquette rather than a postal requirement, the page says so plainly instead of presenting a personal preference as an official standard.
Corrections and feedback
Postal rules and rates change. If you spot something on this site that's out of date, or that doesn't match what USPS Publication 28 actually says, we want to know about it. Email us at hello@correctlyaddressed.com with the page and what you found, and we'll check it and update the page if needed.