Paypal was a nightmare for me. To be fair, this experience was about 5 years ago. Paypal may be a lot more secure now and a lot more user friendly, I do not know.
My confirmation never worked right from setup. I don't know how they do it now, but back then they deposited a low amount, and then you reported the time/date/amount back for verification. Never worked, never verified. I had this done a couple times. Just wouldn't work. Then after a while, no problem. I was a casual ebayer, so there were sprints where I wouldn't use it for 2 or so months. So finally I needed it one day, I logged in, it said I owed 1300 dollars. I checked activity, someone hacked in, created a checking account, and was moving money like crazy. I called paypal, and needless to say getting hold of a human was most difficult at the time. When I finally got a human to talk to, noone knew how to navigate their system. Finally after weeks it got sorted out. After which I cancelled/closed the paypal/ebay accounts, and I will never ever do paypal business again.