Under Turkish law, if a cheque is delivered to a drawee bank before the availability date stated on the cheque, a provision states that the cheque will be considered properly presented and payable on the presentation date. The provision was previously planned to become effective on 31 December 2017 (Provisional Article 3(5) of the Cheque Law). However, this effective date has now been extended to 31 December 2020.
The date was postponed by Article 100 of Law number 7061 on Amendments to Certain Tax Laws and other Laws, published in Official Gazette number 30261 on 5 December 2017. You may find the full text of the Law here (only available in Turkish)