Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances https://postalinspectors.uspis.gov/contactUs/faq.aspx Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances first-class letters and parcels are protected Under certain circumstances Under certain circumstances Under certain circumstances https://postalinspectors.uspis.gov/contactUs/faq.aspx Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances FREQUENTLY ASKED QUESTIONS Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances https://postalinspectors.uspis.gov/contactUs/faq.aspx Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances https://postalinspectors.uspis.gov/contactUs/faq.aspx Under certain circumstances Under certain circumstances U.S. Postal Inspection Service Under certain circumstances Under certain circumstances Under certain circumstances FREQUENTLY ASKED QUESTIONS Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances Under certain circumstances