I had a mobile application idea and shared my idea with my co-worker. Later, he suggested we file for a provisional patent together. We verbally agreed that each of us owns half of the patent rights with the condition of him paying for all the development and legal costs. We went to the IP attorney's office a couple of times together to explain my idea. Finally, the attorney finished the paperwork for the provisional patent. However, I then found out that my name doesn't appear in either the provisional application or power of attorney page.
I emailed my partner to ask why my name does not appear there. He said he doesn't know and said he will add my name on there. However it looks like he just signed on the paper and filed it without my name...
What do you think I should do about it?
Even if there is a way to put my name back and re-file it again, I am not sure if I still want to work with him. Is there a way to file the patent by myself? Or is it that since I already agreed with him for the half of the patent rights, I have no choice but to just go with him?