Thank you
Why do you need the Civil authority office exactly?
As for OP.
All you can do is to give them a friendly call, explain your situation and ask them very friendly if they can help you in this situation. If they say yes you are in luck, if they say no, you'll just have to postpone the dates. There are no companies that put you on top of the pile.
Thanks again,
from a windy Cape Town
From their 'Municipalities' section,
We haven't used them ourselves yet, but bookmarked them a few months ago just in case. Good luck!
That should go like this:
You give them the order to do this, they want to know for certain it is you, so they mail you a paper which you print and have your signature legalised at city hall/ a notary (depending on how it works at your place) This you mail to the notary, he asks for the papers you need locally and send them to you when he has them. Best to sort this out tomorrow, since a couple of weeks can be nothing when it comes to official documents.
I just did the same and as my parents have power of attorney, it took them 3 days to get everything from Greece and then 4 weeks for the Greek consulate here to do the translations and Hague Apostille. If he has no power of attorney it's not possible for any company to do this for you as far as I know.
2-3 months sounds about right for the whole process unless he books a flight back home and does it himself.
P.S Do not forget to get the Hague Apostille for it from Greece. By the way, do NOT get the Pistopoihtiko Gennisis but the Liksiarxiki Praksi Gennissis as the proof of birth. These are identical but the first one is rejected by Swiss authorities, they only recognize the second.