lake will win. >> reporter: we ask the the maricopa county board chairman to address some of the concerns >> i think i want to ask about the extent they can verify ballots mailed out are actually filled out by the people they were intended for and returned by them and not filled out by anybody else. >> on the envelope itself they fill out an affidavit and sign an affidavit that indicates it was them. if the signature doesn't match the signature in our voter registration records we will call them up and try and confirm. did they actually do this? i think there are some election officials who have gone through fbi type training to look at signatures and compare them, right? >> yes. absolutely. >> so many eyeballs are looking at this. >> do we have people who are trust worthy who have gone through thorough background checks we can put in securely knowing our elections, both