Answer
Jul 21, 2026 - 01:01 PM
A 4C mailbox is a type of centralized, secure mailbox system designed to meet the USPS requirements for new construction and major renovations in the United States. These mailboxes are typically installed in apartment buildings, commercial properties, or multi-tenant complexes and include secure compartments for individual units as well as parcel lockers. The "4C" standard ensures enhanced security, durability, and accessibility.
