Istanbul club Başakşehir signed a contract with Mesut Özil on Thursday.
Özil signed one-year contract with Başakşehir with an optional extension of another year.
The 33-year-old wrote a farewell message to Fenerbahçe on his official Twitter account on Wednesday.
"One of the things that make life is that it is full of uncertainties," Özil said, adding: "Our plans, desires and wishes may not always go in the direction you want them to. I wanted to achieve success by getting more chances to play in the Fenerbahçe jersey, which has always been my childhood dream."
In a Twitter post on Wednesday, Başakşehir shared club President Göksel Gümüşdağ's 2018 quote about the possible transfer of Özil: "One day our paths will cross in Başakşehir."
Fenerbahçe announced on its website that Özil's contract with the club has been mutually terminated the same day.
The 33-year-old German midfielder had been dropped from the Yellow Canaries' main squad.
Özil, who played for Real Madrid and Werder Bremen, joined Fenerbahçe in 2021 from Arsenal.
