just on the phone to my mobile insurers - firstly they informed me they use voice software to tell if you are lying (this made my voice go a bit squeaky!) secondly, they took me through some "publicly available information" to see if i was lying like asking me where i lived before and how old my sister in law was!
By the way they ask questions like 'where do you live' to set a standard for your voice when you are not lying so they can see if it changes when they ask the 'real' questions .