This study will discuss the biography of Ahmet Hamdi Pasha, who opposed the national awakening in Anatolia in the days of the War of Independence, and the decisions of the Representative Committee and the Grand National Assembly of Turkey. Ahmet Hamdi Pasha was born in Nikšić, a part of Herzegovina, on June 27, 1871. He was graduated from Military Academy. He was awarded by Abdulhamid II due to his success in his duties within Border Inspection. He joined the opposition side since he was not promoted during the period of the Party of Union and Progress. He entered politics following the Armistice of Mudros and either found or joined organizations against the War of Independence. He is among the founders of the Nigehban Military Association, Kızılhancer Association, and Ila-yı Vatan Association. He also organized the association named Tarikat-ı Salahiye. He supported civil rebellions staged in Anatolia. He was the honorary aide-de-camp of Sultan Vahideddin. He carried out organizations against National Forces as 5th Army Commander in Eskisehir. He frequently visited Vahideddin after the victory of the War of Independence. He attended the meetings held in the seaside residence of Grand Vizier Damat Ferid. He was among the ones who were worried about their future and took refuge in the British Embassy in Istanbul. He was sent to Taskısla by the British on November 6, 1922, and, after staying here for ten days, he was sent to Kostence. Ahmet Hamdi Pasha settled in Kostence city of Romania. His path crossed with Turkey opponents such as Mehmet Ali, Mustafa Sabri, Gumulcineli Ismail, and Vehip Pasha in Kostence. He was taken under the protection of Nizamettin Efendi, son of Yusuf Izzettin Efendi, who was also in Kostence and regarded as one of the wealthiest persons of Ottoman Dynasty. He maintained his communication with Vahideddin through Tutuncubası Sukru. He acquired Albanian citizenship and led a financially easy life. He organized Tarikat-ı Sallahiye also abroad. He operated against Turkey until July 1925. As of this year, he acted as an informant for Turkish authorities regarding the Turkey opponents living abroad. He visited various countries on behalf of Turkey and gathered information. He conveyed information of great value to Turkish authorities. The San-Remo conference, which was among these, included the return plan of Vahideddin to Turkey. An army organization was embarked within the frame of this plan. Ahmet Hamdi Pasha thought that organizations founded by opponents in exile would be unsuccessful. He also strongly criticized the opponent names. Although Turkey paid money to Ahmet Hamdi Pasha, Turkish authorities did not trust him and doubted that he might be a double agent. His friends in exile also doubted him. The intelligence stating that he was an informant got out. However, he always felt confident. He even identified himself with Lawrence. He demanded the facilities provided to him by the British from Turkish authorities. He continued to be an informant throughout his life. Ahmet Hamdi Pasha’s health started to worsen in 1931. Although he continued his works, he also started to collapse in the sense of morale. He made various demands through the applications he made to Turkish authorities. He event sent a letter to the prime minister's office. He demanded his name to be removed from the list of Yuzellilik (The Group of One Hundred Fifty) and to be allowed to return to Turkey. However, Turkey did not take such a decision. His illness aggravated in 1935. He died on January 18. His funeral was held withthe money sent by Turkey. His documents were seized by Turkish authorities, sealed, and sent to Bucharest Embassy. His personal belongings were handed over to his daughter Mihrican. Ahmet Hamdi Pasha, who became famous with “Kiraz” nickname, was condemned to death with the purpose of retry when he was captured in accordance with the second article of Law on Treason following the trial conducted in absentia by Ankara Criminal Court of First Instance on the date of July 3, 1920, when the War of Independence was still continuing. Following the Grand Victory, he fled the country, and was listed first among one hundred and fifty personae non grata, who were excluded from the amnesty within the frame of the General Amnesty Protocol attached to the Treaty of Lausanne. This study will also discuss the life in exile, whistleblowing activities, thoughts on opposition in exile, and psychological breakdown of “Yaver-i Has Kiraz Hamdi Pasha” based on the intelligence (National Personnel Service /MAH) documents, who was included in the List of 150 Personae Non Grate under the section the “Entourage/Company of Vahideddin”, and who was denationalized together with other 150 personae non grate with the law no: 1064 enacted in May 28, 1927.