Distributing lines to the AR (Receivable) control Account

Does anyone have anything useful that will help us find out which AR transactions, of the tens of thousands we get each month that post to the AR Control Account (Receivable Account), have got there because someone actually distributed the transaction to that account - i.e. both sides of the entry pass to the same account.

We know its happened and that its several transactions ... just don't have an easy way of working out which ones.  Except that its 'Transactions' rather than adjustments or receipts. 

Thanks