Since the proportional value is provided at the same time as a standard and necessary message, the number of communications between media is not increased and the invention does not significantly complicate the current process. The invention is based on a new system architecture that allows the able-bodied carrier and participating carrier to pro-rata exchange information on the e-ticket, coupon and coupon in the event of the issuance or modification of the electronic ticket and before the use of the coupon. Therefore, the invention allows both airlines to know, prior to the passenger`s journey, that an agreement has been reached. It is therefore necessary to put in place a method to limit at least some of the aforementioned disadvantages of existing methods. In particular, it would be very cost-effective for airlines to have a method that significantly speeds up the process of agreeing on the value of coupons, without resorting to restrictive solutions leading to the abandonment of independence. In particular, by moving the cycle of the coupon exchange agreement to a concept based on sales rather than a travel-based approach, the invention most often allows an agreement to be reached before the passenger`s journey. As a result, the billing time for most e-tickets is significantly reduced. Regardless of the number of attempts to reach agreements, the numbered value of PV for which an agreement has been reached can be automatically sent to each carrier`s business account modules. The agreement system also includes 5V connection means, 7V, 9V, 5P, 7P, 9P, which are designed for online connection and both channels between the 11V consolidation modules, 11P or electronic Server Systems 1V, 1P, the 3V coupon database, 3P, the 6V proration module, 6P and the acceptance module 8V, 8P. The agreement system also includes the 12V, 12P connection means, which are designed for the online and single-use link between the 11V consolidation module, 11P and 13V turnover, 13P. After the calculation by the module of the proration of a particular carrier, the proportional value is made available to the e-ticket server system of the carrier indicated in real time. The implementation of interline agreements requires a counting according to the rules established for multilateral or bilateral agreements.

This can be difficult due to the multiplicity of agreements with different airlines and the regular introduction of changes to payment rules. At some point, the cost of billing and matching the airline`s receivables and the entire airline industry becomes inefficient. Interline`s efficiency is also affected by delays when the airline does not receive timely revenue due to invoice correspondence. Specifically, the invention refers to an agreement procedure for the approval of a proportional value of an E-ticket coupon, the electronic ticket corresponding to a transport service involving a valid VC carrier and at least one participating pc carrier, which is expected to provide the transport service on that coupon, including the next steps in issuing or modifying the e-ticket and before the use of the coupon. From above, it is clear that, depending on the electronic ticket in play, a contract system may have the role of a valid airline or a participating carrier. In accordance with the information database of documents recorded during each operating period, primary outbound invoices are established to be submitted to partner airlines in accordance with RAM requirements and bilateral agreements. Another advantage of the invention is that the information relating to the value of the coupon and the agreement is contained in the usual messages of the sector, which are already exchanged in the current processes. As a result, the number of communications between porters is not increased and the invention procedure is not much more complex than the current procedures.