Where can I find court cases about careless and sloppy shareholder record keeping by large corporations?

I'm not sure about this specific type of fraud, but I'm sure any company that has infamously "cooked their books" so to speak has done something similar. Enron is an infamous one, and both Fannie Mae and Freddie Mac have been fined hundreds of millions of dollars for accounting fraud, so I wouldn't put it past them to do something like what you're talking about. You could also look up companies that outsourced data input for Y2K; they all frantically tried to computerize data and hoped that it wouldn't be deleted at the turn of the century, so I'm sure that they hastened the process a bit too much in some cases.