Claire Post

Claire Post is 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 best practices. Her work focuses on simplifying complex postal rules into practical, easy-to-follow guides for individuals, businesses, and organizations.

Every guide Claire writes or reviews on this site is checked against USPS Publication 28 and, where a rule is etiquette rather than postal requirement, is marked as such rather than presented as an official standard. See how we check things for the full process.