I very close friend of 30 years passed away and his sister was left as executor and told me that I was not mentioned in the will. I find it hard to believe because I was the closest person to him. She did't show me that will and I don't know what avenues to persure to find out.
If there is a probate case, the will has been filed with the court and you may be able to see it or at least verify that you are not named. For Maricopa County, search for the name here http://www.superiorcourt.maricopa.gov/docket/ProbateCourtCases/ to see if a case exists.