Which Visa office. My Visa office was New Delhi. I m sending you detail what i did in my case .
* just put all passports , current as well as previous ones for yourself and accompanied family members in a small envelope.
* Write detail of these passports on a slip and paste it to this envelope then put this small envelope in a big envelope.
*In this big envelope, please put a covering letter,copy of letter from high commission, RPRF draft ,Medical receipts (if u had not sent it earlier) and any any other document required by CHC
* Write address of ur Local Visa office on it and at the bottom end write ur own address & Phone number.
*After completing all this go to a reputed courier service like Blue dart/ DHL. Mention them that you are sending passports, they will mark it secured mail.
Seal the envelopes in front of courier agent only. He may ask u to show passports.
The receipt provided by courier service carries a way bill no., next day you may track the status of this courier through their website by giving ur way bill no. detail.
Do not worry, pray to Almighty God before despatching. Everthing will be all right. You will get your visa soon
All the best.