Philippe Kaiser has been involved for many years as an examination expert in the federal professional examination for purchasing specialists of the Professional Association for Purchasing and Supply Management – procure.ch. He conducts the oral examination in the subject of (international) contract law. The practice-related questions cover in particular the topics of purchase contracts, contracts for work and services or the order and related issues such as delay in delivery, contractual penalties, guarantees and warranties. Attention is also paid to the General Terms and Conditions of Contract (GTC) and the Incoterms, which are very relevant in international purchasing.