That's a really sad story. To anyone else that may read this and be unfamiliar with how mileage programs work, every mileage program that I'm aware of will send you a statement in the mail for each statement period (usually monthly) where any activity occurs, even if it's not flight activity. Getting no statements at all from BA after a few months should have been a sure-fire sign that something was wrong in this case. I'm not saying that the victim of this most likely administrative error is at fault for not knowing this, but perhaps someone else will benefit from reading this message.