I have had an app in the app store selling for 9 years, ever since the first iPad.
For some reason, when I submitted my latest update, they think that my app is a "business entity" and want proof that I own the "business" that is the name of my app.
I don't understand why after 9 years they think my app name is a business that I need to prove that I own.
I have several apps under different names and they don't seem to require that each name be a separate business.
I think I understand what happened. I had a thank you dialog that comes up, instead of pressing OK, they pressed the button to go to the website.
Amazing how a small UI - can cause a big problem.