A Convertible Note Purchase Agreement (CPA) is a legal agreement between a company and an investor for the purchase of a debt instrument known as a convertible note. A convertible note is an alternative form of financing that allows the investor to convert the debt into equity at a later date. The CPA outlines the terms and conditions of the convertible note, including the amount of the investment, the maturity date, the interest rate, and the conversion rate. There are two types of Convertible Note Purchase Agreement; the Simple Term Note and the SAFE (Simple Agreement for Future Equity). The Simple Term Note is a traditional debt instrument that pays a fixed interest rate and is due on a specified date. The SAFE is a non-dilutive financing instrument that does not bear interest or have a maturity date, instead, the investor has the right to convert the debt into equity at a pre-defined price.