You can either get the old account transferred to the new a/c created after rejoining and get the total benefits (Form 13 for transferring and Form 19, 10c for final settlement) or claim separately. In the second case the withdrawal benefits might decrease due to rounding off of total service. If you get the accumulations transferred address proof may not be required since your date of leaving in this case is taken as dec 2012. Address proof is required only in cases where the member left service before 3 years(The account gets converted to unclaimed deposit account). Different regions insist upon different ID proof. But generally Voter ID/passport/ration card is valid. If your ex employer is okay with sending forms through courier there should be no problem. So my advice is submit form 13 to transfer the old accumulation to new account and form19, 10c for final settlement simultaneously. Pl don't forget to mention your old a/c number& date of joining, leaving in form 19 too. So that they won't settle the new account by oversight.