Under the regulation dated 25 September 2020 and published in Official Gazette No. 31255, sub-merchant transaction tracking has become mandatory for institutions that sign merchant agreements.
The following paragraph has been added to Article 27/A of the Regulation on Bank Cards and Credit Cards, published in Official Gazette No. 26458 dated 10/3/2007.
“(9) Where the merchant with which an acquiring institution has signed an agreement is a payment or electronic money institution subject to Law No. 6493, and that institution lets its sub-merchants use the POS devices it obtained from the acquiring institution within the scope of Law No. 6493, it is mandatory for these institutions to notify the acquiring institution of the sub-merchant using the POS, together with its trade name and tax identification or citizenship number, and to use a reference number that individually identifies the relevant sub-merchants in all such transactions, so that the acquiring institution providing the POS can track the transactions carried out through these sub-merchants on a transaction basis. Acquiring institutions may not sign merchant agreements with, or provide POS devices to, institutions that do not fulfill this obligation. Information about the sub-merchants of merchants obtained by acquiring institutions under this paragraph may not be used for marketing or similar purposes.”
You can access the details of the regulation from the link below.
https://www.resmigazete.gov.tr/eskiler/2020/09/20200925-12.htm
