Relationship between Electronic Ticketing and Transportation Contracts

Summary

An electronic ticket (e-ticket) is a digital record showing the establishment and content of an air transport contract. It does not represent the contract itself, but rather serves as evidence proving the existence of the contract, its parties, fare, flight segments, and applicable general transport conditions. The normative basis for this relationship is established by the Turkish Civil Aviation Law, the Regulation on the Rights of Passengers Traveling by Air (SHY-Passenger), Law No. 6502 on Consumer Protection and the Regulation on Distance Contracts, the Turkish Code of Obligations No. 6098, the Code of Civil Procedure No. 6100, the Electronic Signature Law No. 5070, the Personal Data Protection Law No. 6698, and the Law on International Private Law and Procedural Law No. 5718, as well as the Montreal Convention on international law. This study examines the legal nature of e-tickets, exceptions to the right of withdrawal, unfair terms control, evidence regime, cancellation-delay-overbooking cases, auxiliary services, and the personal data protection aspect, along with concrete application patterns.

Entrance

In civil aviation, ticketless transportation is unthinkable; however, the transition of tickets from paper to digital format has raised new questions regarding the establishment and proof of contract. Does the absence of a signature on an e-ticket affect the validity of the transportation contract? Why does the "right of withdrawal" in the distance contract regime not apply to airline tickets? Under what conditions are clauses such as "no refund" and "cancellation of all segments in case of no-show" in the general terms and conditions of transportation unilaterally prepared by the airline valid from the perspective of consumer law? The answer to these questions must, on the one hand, be consistent with the airline's operational realities and safety regulations, and on the other hand, must also consider the protection of the consumer in accordance with the principles of transparent information, fairness, and proportionality. Therefore, this study examines the contractual function of e-tickets and their consequences within a multi-dimensional framework, in the context of the hierarchy of norms and principles of application.

Legal Nature of Electronic Tickets

An electronic ticket is a digital record containing the mandatory elements of an air transport contract. Together with the PNR (Passenger Name Record), which is a record of the reservation, the e-ticket number shows the passenger's identity, the date and time of the flight, the departure and arrival points, class and fare rules, taxes, and any additional services. According to the Turkish Code of Obligations, air transport contracts are generally not subject to formal requirements; therefore, the absence of a secure electronic signature does not result in the non-constitution of the contract. The contract is established through the online meeting of offer and acceptance, the fulfillment of pre-information obligations, and the payment of the price; the e-ticket functions as primary evidence in proving this establishment. Therefore, rather than being a "promissory note," the e-ticket is a means of proof evaluated based on the integrity and accuracy of the electronic data. Despite the existence of the e-ticket, the boarding pass and DCS (Departure Control System) records serve as supplementary evidence to other aspects of the contract's performance, as they reveal the reasons for delays and details regarding the flight's execution phase.

Legislative Framework and Hierarchy of Norms

On the national side of the legal framework, the Turkish Civil Aviation Law No. 2920 and the SHY-Passenger regulation define the minimum standards of passenger rights and the carrier's obligations in cases of cancellation, delay, and overbooking. From the consumer perspective, Law No. 6502 and the Regulation on Distance Contracts are decisive in terms of pre-information, unfair terms, and exceptions to the right of withdrawal. General provisions of the law of obligations play a supplementary and sometimes decisive role in terms of the formation and interpretation of contracts, impossibility of performance, default, and compensation. The Code of Civil Procedure provides a framework regarding the evidentiary value of electronic data and the distribution of the burden of proof. Law No. 5070 defines electronic signatures and the suitability of data to produce legal consequences through technical-legal bridges; since air transport contracts are not subject to written form, e-signatures are an element that increases probative value in most disputes but is not a condition for validity. The Personal Data Protection Law (KVKK) stipulates obligations regarding the processing, storage, and transmission of PNR, APIS, and SSR/OSI type data. On an international level, the Montreal Convention regulates the carrier's liability regime and limits with respect to delays, baggage damage/loss, and bodily harm to passengers; it also broadly defines the courts where passengers can file their claims through jurisdictional rules. Considering these norms together, it should be accepted as a fundamental principle in practice that passenger rights, which are of a public order nature, and mandatory consumer provisions take precedence over the carrier's general terms and conditions.

The Chain of Contract Formation: Reservation, Information, Confirmation, and Ticketing

In practice, contract formation is completed through flight search and selection, viewing of pre-information pages, acceptance of general terms and conditions of carriage, payment information, and one-time confirmation processes. At this stage, the components of the fare, taxes, fees, and fuel/other surcharges should be presented clearly and understandably as an integral part of the total price. Class rules (such as changes, refunds, no-shows, minimum/maximum stays, and penalty fees) should be prominent and accessible; these rules should be "visible" and "understandable" to the passenger on the booking screen. Otherwise, the inclusion of these records in the contract or their binding nature for the consumer may become questionable in unfair terms review. When the payment process is confirmed, the system generates an e-ticket and PNR; the ticket and travel summary sent to the passenger via email/SMS indicate the formation of the contract. The e-ticket number, booking history (PNR history), and e-invoice/e-archive records together prove the performance and payment relationship.

Nature of Distance Contracts and Exception to the Right of Withdrawal

Online ticket sales are, by their nature, distance contracts; however, the Regulation on Distance Contracts explicitly includes passenger transportation services that must be performed on a specific date or within a specific period as exceptions to the right of withdrawal. Therefore, the classic 14-day right of withdrawal does not apply to airline tickets. However, this exception does not result in a "no refund under any circumstances" conclusion; because in cases such as cancellation by the carrier, significant time changes, or overbooking, the carrier is obligated to provide a free refund, rerouting, and minimum assistance to the passenger within the framework of the SHY-Passenger regulations. Therefore, interpreting the clauses "no right of withdrawal" absolutely to include situations where the carrier is unable to perform or unilaterally modifies the contract is incompatible with consumer law principles.

General Terms and Conditions of Carriage and Unfair Terms Control

General terms and conditions are standard clauses prepared unilaterally in advance and designed for use in numerous contracts. For these clauses to be included in a contract, they must be explicitly communicated to and accepted by the other party. In consumer contracts, clauses that are not negotiated and create an imbalance that violates the principle of fairness against the consumer are considered unfair terms; in this case, the relevant clause is not binding, and the rest of the contract remains valid. In practice, clauses such as "cancellation of all segments in case of no-show," "no refund possible," and "changes can only be made in exchange for a high penalty and within a limited time" are frequently encountered. The validity of these clauses is tested against the principles of transparency, predictability, proportionality, and information. For example, imposing a "no refund" clause in case of significant time changes not attributable to the passenger's fault constitutes a violation of mandatory passenger rights. Similarly, planning connection times below the minimum standard or burdening the passenger with all the consequences of an operational delay may be contrary to equity and the principle of interpretation in favor of the consumer.

E-Ticket Evidence Regime and Burden of Proof

E-tickets and PNR records are electronic evidence within the framework of the Turkish Code of Civil Procedure (HMK). Reservation summaries, fare constructions, RBDs (Reservation Order Forms), tariff rules, and payment verification printouts detail the establishment and content of the contract. Boarding passes indicate actual boarding and performance; in addition, movement messages (OUT/OFF/ON/IN) and delay codes are objective and technical data for determining the cause of the delay and liability. In a dispute, the burden of proof that the carrier fulfilled its obligations under the SHY-Passenger regulations and that there was an unavoidable cause, if any, rests with the carrier; the burden of proof regarding the damage suffered, the causal link, and the foreseeability of the damage rests with the passenger. Therefore, requesting DCS/PNR history, departure times, delay codes, passenger notification content, and official records from the airport operator and the General Directorate of Civil Aviation regarding departure/arrival times from the court is a necessary step in the proof strategy.

SHY-Passenger, Montreal Convention and the Impact of E-Tickets on the Contract

If a passenger holding an e-ticket is denied boarding due to overbooking, the carrier is obligated to provide voluntary assistance, compensation, and rerouting. In case of flight cancellations, the passenger must be provided with a free refund or alternative transportation to their destination within a reasonable time; food and beverage, communication, and, if necessary, accommodation support should be provided depending on the waiting time. In case of delays, threshold periods and the nature of the delay determine the scope of assistance and compensation options. The Montreal Convention, while providing for compensation for damages arising from delay, limits liability in Special Drawing Rights (SDRs) and frames it within the principle of foreseeable harm. In codeshare and interline arrangements, the "operated by" note raises the distinction between the contractual carrier and the actual carrier; the allocation of liability is made by considering the provisions of the convention and the principles of contract law together. In this context, information on who issued the e-ticket and who operated the flight is decisive in determining the liability of the parties.

Compensation Structure, Ancillary Services and the Principle of Transparency

It is known that flight fares include items such as the base fare, taxes/fees, and fuel/other surcharges. In consumer law, due to the principle of transparency, it is expected that the total price should be clearly visible initially, and that the price should not be increased later through drip pricing. Ancillary services such as seat selection, excess baggage, lounge access, and priority boarding are often separate contractual obligations, and their refund/cancellation regimes may differ. It should be remembered that if these services were never performed, absolute statements such as "no refunds whatsoever" may be subject to unfair terms and will be tested against the principle of proportionality in the specific case. Similarly, in procedures related to identity verification and security rules, such as name corrections, demanding exorbitant fees for perfectly reasonable spelling errors may be subject to judicial review both in terms of unfair terms and the principle of good faith.

Limitations on Change, Return, and No-Show Records

Class rules form the core of the change and refund regime. While flexible classes offer broader change and refund options, these may be more limited for promotional tickets. However, in cases of significant carrier-related time changes, cancellations, and overbooking, clauses such as "no refund" or "change only with penalty" cannot be applied, as mandatory passenger rights come into play in these cases. Cancellation of lower-tier segments due to no-shows is acceptable only if it is clearly and understandably communicated and produces proportionate results; otherwise, such clauses that create an imbalance against the consumer may be considered unfair terms. Especially in multi-segment travel within a single PNR, the passenger's access to return flights at a reasonable cost and through a reasonable process is important for interpreting the contract in terms of fairness and reasonableness.

Data Protection: PNR, SSR/OSI and Transfer

E-ticket and PNR data represent a broad dataset including identity, contact, payment, travel history, location, special service requests, and security information. SSR/OSI notes may lead to inferences about the existence of sensitive personal data based on information such as disability, need for accompaniment, or special diets. In accordance with the KVKK (Turkish Personal Data Protection Law), the obligation to inform must be fulfilled in a clear and accessible manner, the conditions for data processing (such as contractual performance, legitimate interest, legal obligation) must be correctly identified, and cases requiring explicit consent for sensitive personal data must be well managed. Data transfer abroad must be carried out through appropriate transfer mechanisms within the framework of KVKK Article 9; an adequate level of protection must be ensured through means such as commitment agreements or Board permission. The obligations to notify the Board and inform relevant parties in case of data security breaches have undeniable consequences for carriers and agents.

Jurisdiction, Applicable Law, and Alternative Dispute Resolution in Disputes

In disputes arising from consumer transactions, consumer courts and, within monetary limits, consumer arbitration boards have jurisdiction. The Montreal Convention establishes specific jurisdiction rules that include options such as the passenger's place of residence, the carrier's principal place of business, the place where the contract was concluded, or the destination. Regarding applicable law, foreign law or foreign arbitration clauses aimed at circumventing mandatory provisions protecting consumers have, in most cases, limited binding force. Since mediation can become a prerequisite for litigation in consumer disputes according to current procedural rules, the temporal and procedural aspects of the application strategy must be carefully planned.

Judicial Approaches and Practice Trends

In judicial practice, e-tickets, PNRs (Passenger Tickets Receipts), and boarding passes are accepted as sufficient evidence to prove the existence, content, and performance of a contract. There is established practice that "no refund" entries are not considered valid in cases of significant time changes and cancellations; the carrier is obligated to offer a free refund or a reasonable rerouting alternative. In cases of overbooking, in addition to compensation and assistance obligations, compensation for material and, if necessary, non-material damages may be awarded within appropriate limits. In compensation for damages arising from delays, the Montreal Protocol's predictability criterion and SDR (Supplementary Demand Reduction) limits are decisive, and the importance of documentation is particularly emphasized. Transparency, non-negotiation, and proportionality are the three fundamental principles shaping the courts' decision-making process in unfair term audits.

Application Scenarios: Connection Loss, Significant Time Change, No-Show, and Overbooking

Assuming that two connecting flights are planned under a single PNR and an operational delay in the first segment makes the minimum connection time virtually impossible, the carrier is obligated to provide an alternative flight and minimum assistance if the passenger is denied boarding the second flight; furthermore, documented and foreseeable damages may be claimed under the Montreal regime. A change in flight time by more than a few hours forward or backward by the carrier constitutes a significant change and requires the provision of a free refund or rerouting options. The rule of canceling all segments in case of a no-show should only be accepted if it is clear, understandable, and proportionate, and reasonable solutions are offered to the passenger. In cases of overbooking, if a passenger is prevented from boarding against their will when no volunteer is available, this creates obligations for compensation, assistance, and rerouting; furthermore, documented additional damages may be claimed under appropriate conditions.

Proof Strategy and Evidence Gathering Techniques

In practice, success depends on the rapid procurement of accurate evidence. In this context, the court should be requested to provide the plaintiff with a summary and history of their PNR (Passenger Tracking Number), flight DCS (Direct Accounting System) records, movement messages and delay codes, passenger information, and call center/electronic correspondence records. Obtaining official data from the airport operator and the General Directorate of Civil Aviation regarding departure and arrival times allows for comparison with carrier data and enables the objective determination of the cause of the delay. Payment authorization records and e-invoice/e-archive printouts demonstrate payment and the completion of the sale; hotel, transfer, and meeting records and documents contribute to establishing predictability and causality in damage claims.

Compliance and Best Practice Recommendations for Carriers, Agents and Passengers

Carriers must keep general transportation conditions up-to-date with clear and layered explanations; make pre-information screens clear and understandable for user experience; and store approval records with timestamps. Managing operational delay codes, providing instant notifications to passengers, and strengthening alternative production processes facilitates the resolution of disputes before they reach the litigation stage. Regular auditing of personal data transfer mechanisms' compliance with the Personal Data Protection Law (KVKK) and rapid notification of possible violations reduce the risk of administrative sanctions. Agents and online intermediary service providers should clarify the carrier-agent liability line at the contractual level; and conduct refund and change flows with transparent and automated processes. For passengers and their representatives, collecting documents at the time of cancellation/delay/overbooking, obtaining written confirmation of alternative offers, and invoicing damages form the basis of the redress process.

Conclusion

Electronic tickets are digital proof of the air transport contract, forming the contractual regime together with the reservation-confirmation-payment triad and the general terms and conditions of transport. The right of withdrawal exception in distance contracts does not eliminate passenger rights in case of performance problems arising from the carrier; because the mandatory provisions of the SHY-Passenger and Montreal Convention give rise to obligations for refund, rerouting, and minimum assistance. Restrictive clauses in the general terms and conditions of transport must be subject to transparency, proportionality, and unfairness scrutiny. In terms of evidentiary techniques, PNR/DCS/operation records and e-invoices illuminate the core of the dispute. The protection of personal data requires particular care due to the confidential nature of PNR and SSR/OSI data. Ultimately, the contractual function of the e-ticket gains meaning within a legal framework that balances the interests of the parties, protects the consumer, and considers aviation safety and operational realities. The correct application of this framework serves both to enable carriers to operate within a predictable compliance regime and to effectively protect passenger rights.