I cosigned XXXX student loans at SallieMae for my son. For the last XXXX years I have made the {$25.00} required minimum payment. Over time as the number of loans grew, so did the payment. I currently send XXXX check for all XXXX loans in the amount of {$100.00}. Suddenly last month they credited the full payment to just XXXX loan and then put the other XXXX loans into a late payment status with extra fees. This happened XXXX other time and they gladly reversed it for me. This time however they tell me it 's just too bad. That I will have to make the late payments and fees on the other loans to get caught up. She said even though it 's their rule I make {$25.00} each they ca n't be expected to know how to credit my account correctly unless I send in XXXX separate payments or detailed instructions on how I want the payment to be credited to each loan. Seriously, it 's simple math XXXX loans x {$25.00} = {$100.00}. Seriously? I should not have to send XXXX checks, nor should I have to write detailed instructions.