After learning ADRs and GDRs and its difference, you should increase your learning by studying about EDRs. EDR means European depositary receipt. If any company wants to sell his shares in European countries, you need European depositary receipt. This receipt is provided by European banks. Suppose, an Indian company want to sell the shares in France. For this, Indian company has to acquire EDR after paying its minimum money. This is usable in the limited countries in Europe. Many European countries accept GDRs as substitute of EDRs.