Competition compliance has become more and more challenging for multinational companies doing business around the world. Currently, more than 120 countries are adopting or have already adopted their own national competition laws, which vary from country to country. Yet competition authorities’ support for competition compliance programmes is wildly inconsistent. For example, a few provide guidance about compliance, and will consider a genuinely implemented compliance programme to be a mitigating factor. But many will not give credit to such programmes. Attitudes towards legal professional privilege also differ across the globe. This may create difficulty in the face of a cross-border antitrust investigation as to how to disclose information to different competition authorities.