The difference is mainly who the consumer is and the type of transaction.
PAR Form CN is the standard Pennsylvania Consumer Notice used to explain the different business relationships a real estate licensee may have with a consumer.
This is the form you would generally use for buyers and sellers, and it can also apply in rental situations when the special conditions for using CNT aren't met.
Its purpose is to inform the consumer about Pennsylvania agency relationships, such as seller agency, buyer agency, dual agency, designated agency, and transaction licensee relationships.
PAR Form CNT is specifically the Consumer Notice for Tenants. It is a more specialized form and is not simply an updated version of CN.
According to the Pennsylvania Association of Realtors®, CNT is used instead of CN when showing rental property to prospective tenants, but only when the licensee is:
PAR also says that if the licensee requires a rental application, CNT may be provided when the application is taken rather than at the first substantive discussion.
PAR Form CN is also not residential-only. It can apply to commercial transactions too. Pennsylvania REALTORS® specifically addresses use of the Consumer Notice in commercial transactions.
The important distinction is: