CNN found a 2020 exchange in which George Santos—going by George Devolder—was confronted by a potential customer who looked into his Ponzi scheme and was told by Deutsche Bank that it was "a complete fraud" (Which, it turns out, was true)
https://www.cnn.com/2023/01/13/politics/george-santos-ponzi-scheme/index.html
https://www.cnn.com/2023/01/13/politics/george-santos-ponzi-scheme/index.html