If you want to make it voluntary, sure. If someone wants to submit a copy of their employee ID or certification to an admin or moderator, that is their choice.
if you want to make it mandatory, than I think it's a bad idea.
If someone wants to be anonymous, just judge them on the content of their posts. Just because someone says they are an MD online, doesn't mean you have to believe them. ditto if they say they are a Flight medic with 80 years of experience. Judge the content based on it's face value; if it's good, use it, if not, ignore it.
And don't forget, you can always ignore what an all knowing knowing RT/NP/MD says, even if he or she is verified by the admins