how to know the fake loan companies?

my father got interested in columbia insurance company because they provie loan at lesser interest rates than the banks like 4% in my case

and since half my commercial pilot training is at hold my father is tempted to get out a loan in more than 6 figures...

but this time they have asked to include other people into taking loans from the firm so that my father can get a lesser interest loan

is there any government body which can check if the bank is legit or not??