Law No. 5651 defines the concept of "public use provider" extremely broadly; whether commercial or not, and regardless of industry, anyone who provides someone with the means to use the internet at a specific place for a specific period falls within this definition:
"Toplu kullanım sağlayıcı: Kişilere belli bir yerde ve belli bir süre internet ortamı kullanım olanağı sağlayanı,"
"Public use provider: a person who provides individuals with the means to use the internet at a specific place for a specific period of time,"
Law No. 5651, Article 2/1-i — unofficial translation — mevzuat.gov.tr
In practice, this definition is simple: your internet line is registered in the name of your business, institution, or organization. When a transaction made over that line — by an employee, a guest, a student, or a visitor — is examined, the question is first directed at the line's owner. At a hotel it's front-desk staff versus the guest staying there; at a cafe it's the server/cashier versus the customer; at a factory it's the shift worker versus the subcontractor; at a school it's the teacher versus the student. The roles differ by industry, but the question is always the same: "who performed this action?"
Without a record, this question cannot be answered, and the uncertainty of responsibility stays with the business or institution. Identity-matched access records — who, which device, which internal IP, what time, which destination, which NAT port — show who performed the action and protect you. This is not a legal guarantee; it is a documentation capability that lets you respond fully and quickly to a request from the competent authorities.