This is a case where balancing your checkbook instead of checking online periodically would cause problems, right? If you relied on what you wrote down, you would probably assume that there was no bank error not in your favor, assume that you have an extra $100 in your account, and eventually overdraw. If you re-read the context of my post, I think we're making a similar argument. I think people should take advantage of on-line banking and such, but the poster I quoted didn't see the need in checking it too often.