If you use ClixSenseResearch, they now require members to verify.

I think this is done only once when you attempt your next cash out.
You can phone verify by your mobile phone and enter a number code it gives you.
Or
You can call them between stated hours and speak to a rep and give the code numbers from your member area.

I just did the mobile verification because I was cashing out.
The process is very simplistic and only takes moments.