How can I talk to my father who would not believe about the e-mails is e-mail scams?

I have some major issues with my own father and he was the one of the reasons why I moved out of the house. I moved out three months ago to help out with my grandparents while my granny is in the nursing home, hopeful be out sometimes this month. How can I convince my own father who does not believe the e-mails that he recieve are scams and he gave out infos out to them as well. He is on home care from Hospic. Are there any way I can get some information on how to clear his name or is it too late for me to do anything. My father and I got into agruements alot about it and he isn't not all there. All he thinking about is money, money and money and I told him that there no one gonna give him money from another country or so whatever. He put my mom and myself under a lot of pressure. I had to lied to him that i sent the check over to them but the truth is that i burned the check and lied to him that I had sent it. He knew that we don't have that kind of money that they wanted. Thanks.