all these rejections on the employment letter are seriously worrying me. My employment letter from my supervisor is not pefect, so am preparing to send them another more detail letter. But I have a question whether the letter's letterhead must be the university's letterhead? Cause I could only provide the letter with our research centre's letterhead. Long story for short that my supervisor's main contract is on this provincial level research centre. He got a title from my university so he could recruit students, that's it, he doesn't get paid from there. And we all working in this research centre which is out of university. What should I do? Am I just being paranoid? Maybe it's fine to send them the same format of employment letter?