[header] How to buy commercial notes [title] Open an account with a brokerage firm. [step] Commercial paper is rarely issued directly to individual investors, so you will need to do business with a broker in order to make a purchase. You can choose from a full-service brokerage firm or a no-frills online broker; both will allow you access to commercial notes. 
[substeps] If you don't already have an account with a stockbroker, consider avoiding commercial notes for a while. This type of debt is unsecured, and thus shouldn't be used as the foundation of an investment portfolio.