Compare CPN numbers with legitimate identifiers such as SSNs, ITINs, and EINs to understand their different purposes and legal status. Learn why no government agency issues a CPN, when an ITIN may be appropriate, how an EIN is used for business purposes, and why submitting a CPN as an SSN substitute can create serious legal problems. https://financenovels.com/blog/what-is-a-cpn-number/