When I was informed by my current mortgagor that rates had fallen in June, I tried to refinance my house. The credit report that was sent to me indicated that my credit score was too low, and that there were several key risk factors that impacted the credit decision. These included:
TOO MANY OUTSTANDING CREDIT CARD BALANCES
TOO MANY NEW CREDIT CARDS (1 IN 24 MONTHS)
TOO HIGH A RATIO OF BALANCES TO CREDIT LIMITS
TOO MANY DELINQUENCIES (1, in 2014 at JCPenney, when I was relocating from Saudi Arabia to the US)

So, I took distributions from my IRA that were sufficient to pay off ALL the outstanding credit card balances in June and on or before July 4th On July 29th, TransUnion still did not reflect the payment of more than $36,800 on a Bank of America credit card... but by the 2nd week of August, my FICO scores shot up to 803 - 824, depending on where we were on the current billing cycle for my regular gas, groceries, etc.

However, on 10/26/2020, I spent 2 hours on the phone with representatives from CredCo, who told me that their query against Experian showed a credit score that was around 759-763... and that they might be using a DIFFERENT ALGORITHM FOR LENDERS than the one that is used to generate the scores displayed on the Experian site and American Express. I explained that the Experian data I was looking at indicated that I was using about 1% of my credit limit... and that had NOTHING to do with some algorithm... and that the Key Factors that were displayed in the letter I received bore no relation to the nature of my credit usage since July 4th.

Experian does not provide contact information to dispute their lying reports to lenders.