I had my Kimlik with me so I thought Id hand that over too ... just in case it changed his mind about needing my passport.
I should have asked why he needed my passport but the feeling I got was that the guy had just enough English ... but not enough to explain why he needed my passport.
It did also cross my mind that it was to claim the vat back, because I had in my mind that Id heard about being able to do this years ago, but why and how I havent a clue - one of my purchases was a large rattan chair, which you couldn't put in a suitcase.
I was in the bank in Fethiye and asked if they new why and they said that maybe its because they would not expect someone who is Turkish to have a Turkish bank card as Izmir isnt so used to dealing with foreigners as they do in Fethiye.
Its all a bit strange as it looked as if as about 50% of the people in Ikeas resturant weren't Turkish.