This Technical Specification will specify the interface between the e-merchant (any commercial customer sending parcels) and the first logistic operator. The interface is composed on two items: ?? the physical label attached on the postal item: contents@ sizes@ minimum requirements to guarantee the quality and efficiency of the logistic process (sorting@ delivery). ?? the electronic exchanges between the sender and the logistic operator with the description of the data to be provided@ the format of the exchanges. While designated operators of UPU have drawn up business requirements using proprietary standards and related data components@ online merchants have developed open@ not-for-profit standards for final delivery which are integrated into their existing supply chain management environment. The Technical Specification aims to specify the interface between the e-merchant (any commercial customer sending postal items) and the first logistic operator composed by incorporating the 3 elements: ?? physical label attached to the postal item with information for item identification; ?? electronic exchanges between the sender and the logistic operator concerning parcels dispatch; ?? data needed for various delivery chain parts@ in particular final delivery to the recipient@ in order to facilitate exchange between the item-specific identifiers. NOTE 1 The last element enables the growth of integrated@ data-driven systems which support highly efficient and customer-driven cross-border ecommerce. This reflects the current trend to B-to-B-to-C delivery solutions in the European and international cross border e-commerce markets. Delivery from original source to final consumer can be split over more than one service provider. NOTE 2 C-to-B-to-B-to-C solutions will be an extension@ in particular when returns are specified. The ??first C?? would indicate that consumers wishing to return items@ or induct items themselves@ will be able to print labels following the fundamentals specified in this standard. E-merchant exchange data with logistic operators (i.e. the postal operators@ but not limited to those designated to fulfil the rights and obligations of UPU member countries) to help@ simplify and enable the consequential logistic and transactional tasks. The establishment of common definitions and electronic formats@ safeguards the reliability and decreases the overall costs by avoiding software development costs@ multiple printing equipment@ over-labelling during the process@ and the manual sorting.