I think they require someother piece of information, like a cellphone or a hand scan as we've seen with some. The whole reason is to limit the number of transactions a customer can do in a day.
Your cellnumber or palm scan can only do x transactions a day.
You are speaking to a guy who personally used one.
No piece of information needed.
No cell phone needed.
No hand scan.
Only limit to transactions is $3,000 per day, but nothing is stopping you from coming back again and getting more bit coin.
No palm scan needed.
No cell phone scan needed.
Trust me, guys. Geeze. Maybe in the USA you have to, but not here in Canada.