On the quest on Telos where you have to get the dorid crendentials for the Ithorian, go see the guy who has them and tell him you'll take care of his debt. Go see the head Ithorian in the Ithorian compound and tell him you need 2,500 credits and he'll give em to you. Go back to the guy with the crendentials and go through dialogue until you can kill him and then kill him. Take the credentials and then you have the left over credits the main Ithorian gave you.