Classes for purchasing certification include Business Ethics for Buyers and Sellers, Managing Inventory: Maintaining the Proper Level, and Essential Law for Buyers and Sellers, according to the American Purchasing Society. Math for Purchasing and Business is also required. All of these classes are available as part of the Certified Purchasing Professional exam prep course.
There are several levels of certification when it comes to purchasing. Certified Purchasing Professional is the basic level and shows that the individual is knowledgeable about purchasing and supply practices, as well as how these impact a business. Certified Professional Purchasing Manager certification is suggested for those in a managerial role, while the Certified Green Purchasing Professional level shows that the individual has completed training that highlights sustainable business practices that are becoming more popular in the industry. Certified Professional Purchasing Consultant certification is recommended for those working as independent consultants or working as educators to those in the field. All upper level certifications require the initial Certified Purchasing Professional certification before they are obtained.
Those applying for purchasing certification must follow a code of ethics and conduct. They are expected to be loyal to their employers and not allow personal feelings to get in the way of making purchases at the best value. Purchasers are forbidden from accepting gifts from suppliers, and they must show a desire to constantly improve their craft.