Thank you for this. I did not receive any email yet, hopefully soon... at least they are now working on 2016 applicants. What documents/proofs of relationship did you include in your application before when u applied? why are they asking for more proofs? how are you going to respond to their email? what proofs are u intending to submit? sorry, I ask too many questions. I am little worried they might ask me of more proofs too, and if in case, I don't know what else to give them as I have provided them everything I got... joint bank account, photos, notarized letters from family and friends, insurance policies where I am the beneficiary, proof of address, etc...
Hopefully yours will be alright, keep being positive...