What is a CPN number?
A CPN number is known as a credit profile number, credit privacy number, and even a secondary credit number (SCN).  It can be used for obtaining credit, and is used in lieu of a social security number in very particular situations.  The CPN number keeps certain personal information private, so it is commonly used by celebrities, government officials and high- level executives.  An individual can be issued only one CPN number over a lifetime and the process is typically handled with the assistance of a legal professional.
The CPN is not a substitution for a social security number. It creates a profile upon which to build credit, however, it is still a part of your underlying credit profile and will in no way eliminate any previous credit history. All debts you incur, past and future, remain your responsibility.
What is a tradeline?
Trade lines are used by credit reporting agencies to develop an individual’s credit score, credit scores vary, with higher scores generally given to individuals with more favorable trade line reporting. Factors considered when calculating the credit score include a number of trade lines, types of trade lines, length of open accounts, and payment history.