Definitely try it on the site. The other day, I was using mine and I received a notice that they were shutting off my ability to send and receive from my mobile device, until I logged in on the site and did a catpcha, to prove I was a real person and not a spambot.
I realize it popped up for me, because I had never used that account, before, so it was a sudden flood of activity. I did the captcha and then took the steps to verify my account, via a code they sent as a text message, to avoid the problem happening in the future.