As a co-signor, I am authorized on my son 's account. We had XXXX Private Student Loans with XXXX XXXX. XXXX loans were combined as a Group on XXXX invoice and we always sent XXXX payment that was pro-rated between the loans. But after the loans were transferred to Navient, NO PAYMENT made in 2015 has ever been posted properly. 

I called Navient in XXXX and again in XXXX to ask that the account be fixed, but nothing ever happened. So in XXXX 2015, I wrote a letter with very detailed Excel spreadsheet attached showing how payments Were vs.Should Have Been applied. 

Instead of correcting the mess, Navient replied that our accounts are in XXXX Standing and that if we suspect that payments have n't been applied appropriately, then please contact them!!!! It 's insanity.