please forgive me - I bought them from what I thought was a reliable source (private collector with a huge amount of autographs, author of a book about autograph collecting etc.)
So definitively sure? Damn! I thought it would be authentic. A red carpet situation, quick scribbling...
I don’t think it’s authentic, but you might want to contact our fellow member Kamran. He’s the most knowledgeable Madonna expert I know. If he says it’s good, then it’s good. I would defer to him on any Madonna item.