Facts
The case concerns A., an insured person born in 1961 who was recognized as 100% disabled by the AI office of the canton of St. Gallen (hereinafter: the AI office) and was awarded a full pension from June 1 to November 30, 1995. After vocational rehabilitation measures, the AI office granted him a half-pension as of June 1, 1996 with a degree of disability of 50%. At the request of the insured person, the AI office then reviewed this decision in 1999 and increased the pension to 100% with retroactive effect to January 1, 1999. In 2012, the AI office re-examined the situation and revoked this last decision, reducing the pension to a half-pension as of September 2012.Considerations
The Cantonal Court partially upheld the insured person's appeal, reducing the pension to a half-pension as of September 1, 2012. The AI office then appealed to the Federal Court.
The Federal Court ruled that the AI office was entitled to revoke the 1999 decision, even more than 10 years later, as it was manifestly erroneous. Indeed, the 1999 decision increasing the pension to 100% was based solely on a medical report from the treating physician, without any further in-depth examination of the file. The Federal Court therefore partially upheld the appeal of the AI office and remanded the case to the Cantonal Court for it to…