My guess is that if you just confirmed your shares a few months back with Petro, you shouldn't have to do it again. Another way to look at it is, the more times you make sure your information is correct, the less of a chance for a an error when have when we receive the info from the Transfer Agent.
They have to make you think they are actually doing something. and watch the congregation get excited.. well how many times will the same trick work???? Amazing. Gracious me?