We are having incredible problems with receiving the passport back. :'(
We sent it via DHL and they received it on July 31. On the following Monday (August 3) they said that they are having problems with mail to Bosnia and asked that we provide prepaid courier coupon instead. So we did that, but when DHL went to pick up the envelope, there was no passport!
Now they tell us that they sent the passport via registered mail on August 3 with Austrian Postal Services and provided us with a tracking number which shows status as "EXPORT" as of August 6...
It has been an incredibly frustrating experience with nobody able to provide an answer.