2009 G20 London summit London Summit and to co-ordinate their actions. The meeting was organised at the initiative of German Chancellor Angela Merkel. The leaders agreed that markets, financial institutions and the wide range of financial assets they create, and hedge funds should be subject to appropriate control. In addition, they called for effective sanctions against tax havens. They also agreed to impose sanctions against countries that intend to undermine their work. Finally, they advocated the doubling of funds available to the IMF. Finance ministers and central bankers of the G20 met in Horsham on 14 March 2009 to prepare for the London Summit.
2017 G20 Hamburg summit part in the 2017 G20 Hamburg summit: Brazilian President Michel Temer initially cancelled his trip to Hamburg without giving any reasons, facing corruption charges by General Prosecutor Rodrigo Janot, who has accused him of accepting bribes from meat company JBS S.A. On July 4, Temer reversed his decision and announced he would attend. King Salman cancelled his plan to participate at the summit and sent State Minister Ibrahim Abdulaziz Al-Assaf on his behalf to lead the Kingdom's delegation to the summit. No official reason was provided. Security zones with limited access, and a significantly larger presence of Hamburg police assisted