I registered at the begining but never took up SGK.Last week decided to de-register.Got my letter,written in Turkish with my details and reasons why and took to the SGK offices.It was so easy!Handed over my letter,lady at the desk got my dossier put the letter in and told me that was it done!!!!!!!!Have got a private insurance with Anadolu Sigorta that covers my needs and cheaper than SGK.Dont qualify for SGK now anyway as been in receipt of a UK pension for almost 4 years.