This document discusses the Cloud Native Network Function (CNF) Certification Program, which provides confidence to Communication Service Providers that network functions from vendors demonstrate cloud native best practices. It outlines the steps to earn "Certified CNF" status, including running certification tests using the CNF Test Suite to test configurations for security, microservices, reliability and other areas. Certification is free for CNCF members and non-profits. The document also provides resources for learning more or getting help with the certification process.