My son, XXXX, is applying for a student loan at Discover to attend Univ XXXX XXXX - XXXX and I am his father and cosigning the loan. Discover advertises a 2.99 % rate as their lowest rate. 

In XXXX, my son and I applied for and received a loan at the lowest rate from Discover. 

In XXXX, another son of mine, XXXX, and I applied to Discover for a student loan for him to attend XXXX XXXX - XXXX XXXX. We received this loan at the lowest rate. 

My credit is excellent. I checked with XXXX XXXX and it is XXXX and XXXX. It is as good as it has ever been. I also recently paid down my home mortgage considerably, which seemed to have a positive impact on my credit score. 

Last week XXXX and I applied for his fall semester and we were give a secondary rate of 4.6 % ( over 50 % higher than the lowest rate ). I called and they said my credit score in XXXX was XXXX and my credit now was XXXX, but still both outstanding scores. 

I have worked hard to get my credit score in an excellent range. Paying down the mortgage was a big part of that and took considerable resources. 

Discover offered no explanation other than the decision is based on their algorithm. 

I do n't believe them and I believe I am unfairly being treated and discriminated against.