nexo-FAST describes a financial application on the Point of Interaction (POI) terminal, based on EMV chip and PIN technology. Provide specifications on a terminal transaction flow for the terminal-to-card interface, the terminal-to-cardholder interface and the exception handling. It also defines the functionalities and identifies the minimum requirements to be supported for: Payment Service (attended and unattended), Refund Service, Cancellation Service, Pre-Authorization Services, Cash Advance and Deferred Payment.
nexo-FAST specifications would allow to access:
The detailed technical specification of the functions, the processing steps and the display of messages and receipts needed to perform Card Services.
Top-level flows describing each of the Card Services and, detailed flows describing the functions and processing steps needed to process the Card Services.
The Data Dictionary providing the technical description of the data elements used in the technical specification.
nexo-FAST is based on EMV Chip and PIN technology and describes unambiguously the financial application on a terminal which meets the functional requirements in the SEPA Cards Standardisation Volume Book of Requirements. nexo-FAST has been developed with the objective of:
- Supporting a uniform "look and feel" of transactions from the cardholder’s perspective
- Reducing the risks of interoperability obstacles between applications
- Enabling an open market for EMV-based components
- Serving as the basis for a "one-stop shopping" for terminal testing and mutual recognition of type approval
- Describing unambiguously the financial application on the SCF compliant terminal
The benefits of adopting nexo-FAST
EMV compliancy: a terminal running the application specifications will be able to accept all payment cards, provided they are compliant with EMV specifications.
Protocol agnostic: the specifications has been designed in a way it could work with different acquirer, TMS or retailer protocols. It can therefore easily be integrated with any of those protocols, so as to match market needs.
Multi-acquirer: specifications has been designed since its inception as a multi-acquirer payment application.
Security: the specifications are based on state-of-the-art security. A strong emphasis has been made on how the terminal data are stored and accessed, to ensure that each module within the application can only access the data that are strictly necessary to its task.
Overall, implementing nexo-FAST will reduce development and certification costs for terminal manufacturers, merchants and banks.
nexo FAST consists of:
The detailed technical specification of the functions, processing steps, display messages and receipts needed to perform Card Services
Top-level flows describing each of the Card Services and detailed flows describing the functions and processing steps needed to process the Card Services
The Data Dictionary giving the technical description of the data elements used in the technical specification
nexo FAST will be delivered in two parts:
Part 1, for the POS Environment
Part 2, for the ATM
nexo FAST Part 1: Version 3.1
Version 3.1 of nexo FAST Part 1 is an update of Version 3.0 with clarifications and corrections responding to comments received from implementers.
The following topics are still under discussion and will be covered by bulletins during the consultation phase:
- Dynamic Currency Conversion (DCC)
- PIN Bypass
- Volume Compliance of the Pre-Authorisation Services
- Restart of Contactless kernels in Technology Selection
- UI Request Processing
nexo FAST Part 1Version 3.1
nexo FAST Part 1Version 3.1