Originally Posted by
sid7122
Hi Guys i am am flying Etihad Airways(under one ticket and bagged checked through to my destination) SOF-FCO-AUH-SEZ. My flight from SOF (AL Italia) arrives in the FCO airport at t3 and my flight to AUH (Etihad) leaves from T1. Can i do this airside, considering the fact that i am a Thai citizen and i dont have a schengen visa. Thanks for the help

I wonder who gave you the info you have:
1) Both Bulgaria and UAE are outside the Schengen zone and you'll never leave it; thus, you don't need a visa.
2) Moreover, you'll never have to enter the Schengen zone, as Terminal 1, which is within the Schengen, is not used by bona fide Etihad flights: they certainly don't fly to AUH from there (unless there are major changes due to the fire, which I doubt), but from T3. You will therefore stay airside throughout your stay at FCO.
Make sure you don't do any unneeded excursions in FCO, check the monitors!!!