Originally Posted by
benberg2013
I'm afraid the only option would be to use the A3 gold. Turkish have a rule that they only match One World Emerald status (Air Berlin platinum) , Skyteam elite plus, and Star Alliance gold - and only A3 would match these criteria. You should take a screen shot showing your gold status, and send it in the online form as an attachment.
...which is weird, considering TK Elite requires fewer miles than many OW Sapphire plans.