Member ID Verification via Phone

Hi all,

I'm wrapping up an audit of our call center and wanted to see what other CUs are requiring for members to verify their identification for inquiries and transactions done over the phone. I feel like our verification requirements are a little light, but need to get some support for that notion prior to suggesting that to management. Are there any guidelines or best practices out there for what CUs should be requiring? Aside from that, what does your CU require for phone verification?

Thanks,

Ryan