Sallie Mae recently bought my student loans. Fine, whatever, I have no say in the matter. But their online account management is terrible. You cannot make a "principal only" payment from its Web site. You can make an extra payment beyond the minimum, but it will apply part of it to interest no matter what. I called customer service and spoke to someone for whom English is clearly a second language and was advised (I think) that there was no way to make a principal only payment other than to send a check (people still use checks?) with a letter "on bond paper" requesting that the payment be applied to principal only, or unenroll from auto-debit, which would make me ineligible for the interest rate reduction I receive for being enrolled in auto-debit.
Is it so hard to have a function on the Web site that every other lender I have ever dealt with has? I just want to make my extra "principal only" payment after my regular payment is drafted, like I have been doing for five years now with the prior loan servicer.