My questions about referees is: 1) For how long they must known the applicant? 2) Do they need to currently live in the UK? 3) Do I need to send the originals?
1) I read in some unofficial websites pages that it should be more than 3 years, but it doesn't say anything in the HO "Referees and Identity" form , nor in the HO Naturalisation booklet so I am a bit confused.
2) Also,do you know if he/she can be a British citizen that is not living in the UK anymore ?
3) If I am correct, both two referees should be sent to the HO in the post . Do we need to send the originals?
Due to the current situation and to avoid contact, I am asking one of my referees to sign it at home, scan it and send it to me. Will it be valid ?
Thank you so much for taking the time and answering the question

I hope everybody is safe !