KVKK Compliance for E-Commerce Companies in Turkey

Introduction

E-commerce companies in Turkey process large volumes of personal data every day. Customer names, phone numbers, email addresses, delivery addresses, payment information, order history, invoice details, IP addresses, device data, cookie identifiers, shopping behavior, customer support records, return requests, product reviews, loyalty program data, and marketing preferences are all part of the modern online retail ecosystem. While these data help companies provide services, improve customer experience, prevent fraud, and conduct marketing, they also create serious legal obligations under Turkish Personal Data Protection Law.

Turkey’s main personal data protection legislation is Law No. 6698 on the Protection of Personal Data, commonly known as KVKK. The law aims to protect fundamental rights and freedoms, particularly the right to privacy, in relation to the processing of personal data, and it sets out obligations, principles, and procedures for natural and legal persons processing personal data.

For e-commerce companies, KVKK compliance is not a theoretical issue. Every stage of the online sales process involves data processing: registration, product browsing, cart creation, checkout, payment, delivery, invoicing, customer support, returns, campaigns, remarketing, analytics, and fraud prevention. Therefore, an e-commerce business operating in Turkey must design its website, mobile application, marketing strategy, vendor contracts, data retention systems, and cybersecurity practices in accordance with KVKK.

Why KVKK Matters for E-Commerce Businesses

E-commerce businesses are data-driven by nature. The more advanced the platform becomes, the more data it usually processes. A basic online store may process identity and contact data. A marketplace may process seller data, buyer data, payment data, logistics information, product reviews, dispute records, and internal risk scores. A mobile commerce application may also process location data, device identifiers, push notification preferences, and behavioral analytics.

This creates a high-risk compliance environment. A single e-commerce platform may include several different data processing purposes: creating membership accounts, completing sales contracts, processing payments, delivering goods, issuing invoices, responding to customer requests, managing returns, sending commercial electronic messages, operating cookies, conducting fraud analysis, maintaining IT security, and complying with legal obligations.

Under KVKK, personal data processing is lawful only if it complies with general principles and relies on a valid legal basis. Personal data must be processed lawfully and fairly, be accurate and up to date where necessary, be processed for specified, explicit, and legitimate purposes, be relevant, limited, and proportionate to those purposes, and be stored only for the period required by law or by the purpose of processing.

For an e-commerce company, this means that collecting customer data simply because it may be useful in the future is risky. Each data category must be connected to a clear purpose. The company should know why it collects the data, how long it keeps it, who can access it, whether it transfers it, and when it deletes or anonymizes it.

Personal Data Commonly Processed by E-Commerce Companies

E-commerce companies commonly process several categories of personal data. These may include identity data such as name and surname, contact data such as email address and phone number, address data such as billing and delivery addresses, transaction data such as order history and invoice details, financial data such as payment status and refund records, customer communication data such as support tickets and call center recordings, and digital data such as IP addresses, cookie IDs, device information, session logs, and browsing behavior.

Some e-commerce companies may also process special categories of personal data, although this is less common. For example, a health products platform may process health-related information, a marketplace may process criminal record or compliance information for certain sellers, or a platform may use biometric verification for account security. Special categories of personal data are regulated more strictly under Article 6 of KVKK and include data such as health data, biometric data, genetic data, criminal conviction data, religious belief, political opinion, union membership, and similar sensitive categories.

Because e-commerce data flows are complex, companies should prepare a detailed personal data processing inventory. This inventory should list data categories, data subject groups, processing purposes, legal bases, recipient groups, transfer locations, retention periods, and technical and organizational measures.

Legal Bases for Processing Customer Data

A common misunderstanding is that every data processing activity in e-commerce requires explicit consent. This is not correct. Under KVKK, explicit consent is only one legal basis. Personal data may also be processed without explicit consent where processing is expressly provided by law, necessary for contract performance, necessary for compliance with a legal obligation, necessary for the establishment, exercise, or protection of a right, necessary for legitimate interests of the controller provided that fundamental rights and freedoms are not violated, or based on other grounds listed in Article 5.

For example, processing a customer’s name, address, phone number, and order details to deliver a purchased product may be based on contract performance. Processing invoice records may be based on legal obligations. Processing payment status and refund records may be necessary for contract performance and legal obligations. Processing customer complaints may be necessary for customer service, consumer law compliance, and protection of rights. Keeping certain transaction records may be necessary for accounting, tax, and possible dispute purposes.

However, not every activity can be justified by contract performance or legal obligation. Personalized marketing, behavioral advertising, non-essential cookies, loyalty profiling, and sharing customer data with third-party advertisers may require explicit consent or another carefully assessed legal basis. The company must determine the correct legal basis for each processing activity separately.

Privacy Notices for E-Commerce Platforms

One of the most important KVKK obligations is the obligation to inform. At the time personal data is obtained, the data controller must inform data subjects about the identity of the controller and its representative, if any; the purpose of processing; to whom and for what purposes data may be transferred; the method and legal basis of collection; and the rights of the data subject.

The Communiqué on the Obligation to Inform also clarifies that the obligation to inform must be fulfilled regardless of whether processing is based on explicit consent or another legal basis, and that where processing is based on explicit consent, informing and obtaining consent must be carried out separately.

For e-commerce companies, a generic privacy policy is usually insufficient. The privacy notice should reflect actual processing operations. A strong e-commerce privacy notice should explain account creation, order processing, payment operations, delivery, invoicing, customer support, returns, complaint management, fraud prevention, website logs, cookies, marketing communications, commercial electronic messages, loyalty programs, product reviews, legal claims, and data retention.

The notice should be accessible before or at the time of collection. For example, customers should see the relevant privacy notice during membership registration, checkout, marketing subscription, cookie consent, mobile application installation, and customer support interactions.

Explicit Consent in E-Commerce

Explicit consent under KVKK must be specific, informed, and freely given. It should not be hidden inside general terms and conditions or bundled with unrelated approvals. It should be based on a clear affirmative action.

In e-commerce, explicit consent may be required for certain marketing activities, non-essential cookies, behavioral advertising, sharing data with third-party marketing partners, optional loyalty programs, profiling activities that are not necessary for the service, and some exceptional international transfer scenarios.

However, e-commerce companies should avoid requesting consent unnecessarily. If a data processing activity is necessary to complete a sale, deliver a product, issue an invoice, or comply with law, consent is usually not the correct legal basis. Asking for unnecessary consent may create confusion because the customer may later withdraw consent even though the company still has a legal obligation to process certain data.

For example, a customer does not need to consent to the processing of delivery address data if the address is required to deliver the purchased product. But if the company wants to use the customer’s purchase history to send personalized promotional campaigns, a separate consent or other valid legal basis may be needed.

Commercial Electronic Messages and Marketing Consent

E-commerce companies frequently send emails, SMS messages, push notifications, and promotional calls. These activities must be assessed not only under KVKK but also under Turkish electronic commerce and commercial communication rules.

The Turkish Message Management System, known as İYS, is described as a national platform where commercial electronic message permissions and complaint processes can be managed under the relevant law and regulation. Private legal commentary also explains that commercial electronic messages generally require recipient consent and that recipients may refuse receiving such messages at any time.

From a KVKK perspective, marketing consent and personal data processing consent should be carefully structured. A customer’s consent to receive commercial electronic messages does not automatically justify every type of data processing for profiling, analytics, or third-party advertising. Similarly, a KVKK explicit consent text does not automatically satisfy all requirements under commercial electronic message rules.

A compliant e-commerce business should keep separate and traceable records for commercial communication permissions, KVKK explicit consents, privacy notices, opt-outs, and withdrawal requests. Marketing databases should be synchronized with opt-out mechanisms, İYS records where applicable, CRM systems, and campaign tools.

Cookies, Tracking Technologies, and Online Behavioral Data

Cookies and tracking technologies are central to e-commerce. They help with session management, cart functionality, security, language preferences, analytics, advertising, remarketing, affiliate tracking, and personalization. However, many cookies process personal data or may be used to identify or profile users.

Strictly necessary cookies used for core website functions may be treated differently from advertising, analytics, or behavioral profiling cookies. For example, a cookie that keeps items in a shopping cart may be necessary for the service. But a third-party advertising cookie used for retargeting may require explicit consent.

A proper e-commerce cookie compliance structure should include a cookie policy, a clear cookie banner, granular consent options, rejection options, records of consent, and the ability to withdraw or change preferences. Pre-ticked boxes, forced consent, vague “by continuing to use this website you accept all cookies” language, and hidden third-party trackers may create compliance risks.

The company should also review third-party scripts, pixels, analytics providers, social media plugins, affiliate tools, heatmap tools, chatbots, and advertising networks. These tools may transfer data to third parties or abroad, and they should be included in the data inventory and privacy notices.

Payment Data and Fraud Prevention

Payment processing is one of the most sensitive areas for e-commerce companies. Many platforms do not directly store full card details but use payment service providers, virtual POS systems, digital wallets, or payment intermediaries. Even if the e-commerce company does not store full card numbers, it may still process payment status, transaction IDs, refund data, invoice data, fraud signals, and customer identity information.

The company should clearly define whether it acts as a data controller or whether payment providers act as independent controllers or processors in specific data flows. Contracts with payment providers should address data security, confidentiality, retention, incident notification, and transfer obligations.

Fraud prevention may rely on legitimate interest or legal protection grounds in some cases, but it must still comply with proportionality. Excessive profiling, blacklisting, device fingerprinting, or automated risk scoring without transparency may create legal risks. If automated decision-making produces adverse results for customers, such as account blocking or order cancellation, the company should ensure that the process is fair, explainable, and subject to human review where appropriate.

Logistics, Delivery, and Third-Party Service Providers

E-commerce cannot function without logistics providers, cargo companies, warehouses, suppliers, call centers, accountants, software providers, cloud service providers, marketing agencies, and customer support tools. These third parties may receive or access customer data.

Domestic data transfers are regulated under Article 8 of KVKK. Personal data cannot be transferred without explicit consent unless one of the legal conditions under the law applies. For example, transferring customer name, phone number, and delivery address to a cargo company may be necessary for contract performance. Transferring invoice records to an accountant may be based on legal obligations. Transferring dispute-related information to a lawyer may be necessary for the establishment, exercise, or protection of a right.

However, each transfer must be limited and purpose-based. A cargo company should receive only the data necessary for delivery. A marketing agency should not receive full customer databases unless there is a lawful basis and a clear contractual framework. A customer service provider should access only relevant support data.

E-commerce companies should sign data processing agreements or confidentiality clauses with vendors where appropriate. These contracts should define data categories, processing purposes, instructions, security obligations, breach notification duties, deletion obligations, audit rights, and sub-processor rules.

Cross-Border Transfers in E-Commerce

Many e-commerce companies use foreign infrastructure. Cloud servers, CRM tools, email marketing platforms, analytics services, fraud prevention tools, customer support software, payment infrastructure, mobile push notification services, and global group company systems may all involve international transfers of personal data.

Article 9 of KVKK was significantly amended in 2024 by Law No. 7499. The Turkish Personal Data Protection Authority announced the English translations of the By-Law on the Procedures and Principles for the Transfer of Personal Data Abroad and the standard contract texts prepared for international transfers.

Under the amended Article 9, personal data may be transferred abroad if one of the processing conditions under Articles 5 or 6 exists and there is an adequacy decision for the relevant country, sector, or international organization. If there is no adequacy decision, transfers may be possible through appropriate safeguards, including binding corporate rules, standard contracts, or written commitments approved by the Board. Standard contracts must be notified to the Authority within five business days after signature.

The Authority has published four standard contract types: controller-to-controller, controller-to-processor, processor-to-processor, and processor-to-controller. For e-commerce companies, choosing the correct module is critical. A Turkish online store using a foreign cloud provider may need a controller-to-processor standard contract. A marketplace transferring data to an independent foreign seller or business partner may need controller-to-controller analysis. A processor using a foreign sub-processor may need processor-to-processor documentation.

Data Security Obligations for E-Commerce Companies

E-commerce companies are attractive targets for cyberattacks because they process customer databases, transaction information, login credentials, payment-related data, and behavioral data. KVKK Article 12 requires data controllers to take all necessary technical and organizational measures to prevent unlawful processing, prevent unlawful access, and ensure the protection of personal data.

Practical technical measures may include encryption, secure password policies, multi-factor authentication for admin panels, role-based access control, secure coding, vulnerability scanning, penetration testing, web application firewall, logging, database access restrictions, API security, malware protection, DDoS protection, secure backups, and incident response systems.

Organizational measures may include employee training, confidentiality undertakings, vendor due diligence, access authorization procedures, internal policies, disciplinary rules, data retention schedules, breach response plans, and regular audits.

Special attention should be paid to admin panels and customer databases. Unauthorized access to an e-commerce admin panel may expose thousands of customers’ names, addresses, phone numbers, order histories, and support records. Access should be limited, logged, reviewed, and revoked immediately when employees leave or change roles.

Data Breach Notification

If processed personal data is obtained by others unlawfully, the data controller must notify the data subject and the Personal Data Protection Board within the shortest time. The Board may also announce the breach where necessary.

E-commerce data breaches may include hacked customer databases, ransomware attacks, unauthorized access to order records, accidental email disclosure, compromised API keys, misconfigured cloud storage, stolen admin credentials, payment fraud incidents, and unauthorized sharing of customer data with third parties.

A breach response plan should include detection, containment, forensic investigation, legal assessment, notification drafting, customer communication, vendor coordination, evidence preservation, and remediation. E-commerce companies should not wait until a breach occurs to design this process.

Retention, Deletion, and Anonymization

E-commerce companies often keep customer data longer than necessary. Old accounts, abandoned carts, inactive customer profiles, outdated marketing lists, expired support tickets, old call recordings, and obsolete log records may create unnecessary risk.

Under KVKK, personal data must be erased, destroyed, or anonymized when the reasons requiring processing no longer exist. The By-Law on Erasure, Destruction or Anonymization of Personal Data provides that all operations relating to erasure, destruction, and anonymization must be recorded and that those records must be stored for at least three years, excluding other legal obligations.

An e-commerce retention policy should define retention periods for membership data, order records, invoices, payment records, delivery records, customer support tickets, complaint records, marketing consent logs, cookie consent logs, call recordings, abandoned cart data, fraud prevention records, and website logs.

The company must also distinguish between deletion and continued retention for legal obligations. For example, invoice records may need to be retained under tax and commercial rules, while marketing data of an inactive customer may no longer be necessary. The company should avoid deleting records that are legally required, but it should also avoid retaining unnecessary data indefinitely.

Data Subject Rights in E-Commerce

Customers, users, sellers, and other data subjects have rights under KVKK. They may request to learn whether their personal data is processed, obtain information about processing, learn the purpose of processing, know third parties to whom data is transferred domestically or abroad, request correction of incomplete or inaccurate data, request deletion or destruction under legal conditions, request notification of correction or deletion to third-party recipients, object to adverse results arising exclusively through automated systems, and claim compensation for damage caused by unlawful processing.

E-commerce companies must have a procedure for handling these requests. A customer may ask for deletion of an account, correction of address information, information about data transfers, withdrawal of marketing consent, or details of automated profiling. The company must verify identity, evaluate the legal basis, protect third-party rights, and respond within the legal period.

Customer service teams should be trained to recognize KVKK requests. A message such as “delete all my data,” “stop using my phone number,” “tell me which companies you shared my data with,” or “remove my membership information” may be a data subject request even if it is not written in formal legal language.

VERBIS Registration for E-Commerce Companies

The Data Controllers’ Registry, known as VERBIS, is an important compliance topic. The By-Law on the Data Controllers Registry states that data controllers obliged to register must register before starting data processing. The registry includes information such as processing purposes, data categories, recipient groups, foreign transfer information, security measures, and retention periods.

Not every e-commerce company has the same VERBIS obligation, and exemptions may apply depending on the company’s characteristics. However, online businesses should carefully assess whether they are required to register. E-commerce companies often process large-scale customer data, digital identifiers, marketing data, and transaction records, so VERBIS analysis should not be ignored.

VERBIS entries must also be consistent with the company’s actual data processing inventory, privacy notices, transfer practices, and retention policy. Inconsistencies may weaken the company’s compliance position.

Marketplace Platforms and Seller Data

Marketplace platforms have additional complexity because they process both buyer and seller data. Sellers may be individuals, sole proprietors, companies, authorized representatives, employees, or shop managers. The marketplace may process seller identity data, bank account information, tax information, product listings, transaction history, customer communications, complaints, performance scores, and sanctions.

Marketplace operators must define whether they act as data controllers, processors, or independent controllers in different data flows. For buyer-seller communications, returns, disputes, and marketplace analytics, roles may become complicated. The platform should clearly explain data processing practices to both buyers and sellers.

Seller panels should include proper privacy notices. Access to buyer data by sellers should be limited to what is necessary for order fulfillment and customer communication. Sellers should not be allowed to export, misuse, or independently market to buyers unless legally permitted.

Mobile Commerce Applications

Mobile applications create additional privacy issues. They may process device identifiers, push notification tokens, location data, app usage behavior, crash reports, in-app search history, wish lists, biometric login preferences, and mobile analytics data.

A mobile commerce app should not request unnecessary permissions. For example, access to contacts, camera, microphone, location, or photos should be requested only where necessary and clearly explained. Push notifications used for marketing should be assessed separately from functional notifications such as order updates.

App privacy notices should be accessible before or during installation and within the app. Consent mechanisms should be designed for mobile interfaces and should not rely on unclear or manipulative design.

Practical KVKK Compliance Checklist for E-Commerce Companies

An e-commerce company in Turkey should follow a structured compliance program:

1. Prepare a detailed data inventory covering website, mobile app, CRM, payment, logistics, marketing, analytics, and support systems.
2. Identify data subject groups: customers, members, visitors, sellers, employees, suppliers, and business contacts.
3. Determine the legal basis for each processing purpose.
4. Prepare accurate privacy notices for membership, checkout, cookies, marketing, customer support, and seller operations.
5. Separate explicit consent from privacy notices.
6. Implement a cookie banner with granular choices for non-essential cookies.
7. Maintain marketing consent and opt-out records, including İYS-related records where applicable.
8. Review contracts with cargo companies, payment providers, cloud providers, marketing tools, call centers, and software vendors.
9. Map cross-border transfers and implement Article 9 safeguards where required.
10. Establish data subject request procedures.
11. Implement technical and organizational security measures.
12. Prepare a data breach response plan.
13. Define retention and deletion periods for each data category.
14. Assess VERBIS registration obligations.
15. Train customer service, marketing, IT, legal, and operations teams.
16. Audit third-party tracking tools and advertising technologies.
17. Review mobile app permissions and push notification practices.
18. Ensure seller and marketplace data flows are legally structured.
19. Keep evidence of compliance, including consent logs, notices, contracts, and deletion records.
20. Update the compliance program when laws, technologies, or business models change.

Common Mistakes in E-Commerce KVKK Compliance

One common mistake is copying a generic privacy policy from another website. This rarely reflects the company’s actual data flows. Another mistake is treating checkout consent as permission for every future marketing, profiling, and advertising activity.

Many e-commerce companies also use cookies, pixels, and third-party scripts without proper review. Marketing teams may install new tools without legal or IT approval, causing undisclosed data transfers and tracking.

Another frequent mistake is giving too many employees access to customer databases. Customer service, warehouse, finance, marketing, and IT teams may all need different access levels, but not everyone needs full access to all customer records.

Some companies fail to delete inactive account data or old marketing lists. Others transfer customer data to foreign platforms without Article 9 analysis. Marketplace platforms may also fail to restrict sellers from misusing buyer contact information.

Conclusion

KVKK compliance for e-commerce companies in Turkey requires more than a standard privacy policy. E-commerce businesses process personal data at every stage of the customer journey, from website visit to delivery, from payment to returns, and from marketing to customer support. Each processing activity must have a lawful basis, a clear purpose, appropriate notice, proportional data collection, secure storage, and a defined retention period.

The most important compliance areas for e-commerce companies include customer data processing, privacy notices, explicit consent, commercial electronic message permissions, cookie management, payment data, logistics transfers, vendor contracts, cross-border transfers, data security, breach notification, VERBIS assessment, and data subject request management.

The 2024 amendments to KVKK Article 9 make cross-border transfer compliance especially important for e-commerce businesses using foreign cloud providers, CRM tools, analytics systems, payment infrastructure, email marketing platforms, and global support services. Companies must identify foreign data flows and implement appropriate safeguards where required.

A well-designed KVKK compliance program protects the company from regulatory risk, customer complaints, administrative fines, reputational damage, and operational disruption. More importantly, it builds customer trust. In a competitive digital market, customers are more likely to trust e-commerce brands that handle personal data transparently, securely, and lawfully. For any e-commerce company operating in Turkey, KVKK compliance is not only a legal obligation; it is a core part of sustainable digital business.