on my receipt pages, there is only 2 blank for signature of an authorised and passport’s owner. I signed only on passport’s owner. Yep I printed everything as on STV, there is no place to attach for financial support and inviting letters. Therefore, I put all. I got my visa back yesterday (submitted on last Tuesday).
I did sign for applicant name but not for someone else. You need to print the application receipt (barcode one). I also put all support documents in the envelope (just in case) and You have to put the original passport.