Longterminvest.net investos are enabled to check out their payments status at a payment check page. I'm not sure why it is needed but it at least shows that administration wants to be useful:
We are representing you a new service of checking payments made via Liberty Reserve. Now all payments made from october 1, 2009 are registering at our data base. In order to check a payment belonging to the LongTermInvest, you have to know the batch number of the payment and enter it in the special form on the check payment page. If a payment really belongs to the LongTermInvest, you will see additional information.