Did he pay some in advance and told the Kaminoans the Republic will pay the rest? According to wookipedia Palps convinced him to order the clone army. I cannot really see the Kaminoans not asking for at leas 50% in advance. So where did the money come from and how were they able to hide such a huge transfer. Why didn't the investor's end up on the front cover of the Coruscant Stock Broker or why didn' the SW SEC look into it? I could imagine journalists getting curious about the matter of a huge army coming out of nowhere. Was there a senate comission that looked into this?