The Romanian-Hungarian border after the end of the Second World War was one of the priorities of the Petru Groza government at the Paris Peace Conference in 1946. The border before the Conference benefited from additional protection from the Romanian authorities to prevent the illegal crossing of the border by the Hungarians. Even after the ratification of the Peace Treaty in 1947, there were incidents on the Romanian-Hungarian border. Due to the fact that at the beginning the Romanian-Hungarian border did not benefit from official recognition by international bodies, surveillance was mainly done through security and defense missions, with the exception of the border with the USSR. In 1944, in Northern Transylvania, the Soviets began an extensive border surveillance activity. Soviet military rule was maintained from November 1944 to March 1945, with the coming to power of a pro-Soviet government led by Dr. Petru Groza. Also, while the Soviet leadership controlled Northern Transylvania, they made provisions for the Border Guard Corps, which was significantly reduced. From a number of 44,000 in 1944 to 12,000 in April 1945. The Frontier Police also underwent permanent restructuring, coming under the supervision of the Allied Control Commission. In order to avoid illegal border crossing, we will see throughout this article that Romania has taken special measures to prevent this. This caused discontent among Hungarian citizens living in Hungary, as they were subjected to a series of bureaucratic procedures that made it difficult for them to come to Romania. In 1946, the Border Troops Command belonging to the Ministry of National Defense was established. The pedantic problems between Romania and Hungary regarding this aspect were dealt with within the Ministry of the Interior. The numerous problems caused by crossing the border determined the creation of a mixed Romanian-Hungarian delegation to discuss and lay the foundations for a convention in order to solve the existing problems. The first convention aimed to settle the points being accepted by both parties. Later, the Hungarian side requested the reinstatement of the Convention for Small Border Traffic with Hungary from 1931, which, however, was not accepted by the Romanian state. On November 25, 1947, with the arrival of the Hungarian delegation in Romania, a Protocol was signed. Point 3 of it referred to the issue of movement of people who have property in both countries. Transit visas were also on the agenda of the discussions. The two delegations held numerous negotiations between 1945-1949, but which did not lead to the definitive stop of the fraudulent crossing of the border with Romania.