I know this sounds silly but why not ask the daughter why she wants her bank information. It really is none of her business.
If there I fraud going on isn’t the OP in the clear. She did not fraudantly sign the the FAFSA. Both the father and daughter would be in trouble.
Assuming that there is no fraud, then it appears that the father is taking care of his daugher. There are so many stories posted here where the parents refusing to help pay for college even when able. Poisoning the well is another issue but we are not hearing the other side of the story.