About the Chicago painting

I don't know who this people are but some one is using my name without autorization. I am the real Armando Trentini son of the artist. I know all my father works and I can reconize is style, the Chicago painting was in my gallery in Chicago in 1988/89 and if I see the photo I will be able to determined which one is the original painting. I like for everyone to know that I will take legally action against who is using my name or try to sale fake of my father paintings.