If he is still capable of making his own decisions and signing the paperwork, you don't need POA.actually to update its a funny situation as I finally got hold of the paperwork.
My dad bought the car brand new in Nov 09 and put it under my name but he paid for it.
Then march 2011 he transferred it back to his name so he can use it and insure it.
Now when completing the forms online, there is a section if I needed a power of attorney to represent him. But it says if I'm just assisting him in doing the registration process, I don't think I need to check that option do I?
You'd know if you needed POA because you would have gotten it long before this case. It's used when the person you have power over can no longer make those decisions either mentally or physically.