The Domestic Clearing and Settlement System (YTH) is a system that settles and clears transactions between two banks when a transaction is made using one bank's card at a different bank's POS or ATM. Records are submitted to the YTH system by participants, and these records are cleared daily, multilaterally netted, and reconciled (settled).
Two types of message formats are supported in the Domestic Clearing and Settlement System.
YTH Format:
Transaction types are distinguished by transaction code and usage code values. Information about the transaction is sent within packets called TCR. The YTH Format can be accessed through BKM Online.
BTH Format:
In the message structure, which is designed based on the ISO 8583 standard, transaction types are distinguished by MTI (Message Type Identifier) and Function Code.
Choosing a format
Banks determine which format they will use to send clearing records as part of their integration with the system. Each format has its own field definitions and validation rules; a record sent in the wrong format is rejected.
The clearing process includes file generation, submission, processing of the response file, and error correction steps. There are limited time frames for correcting and resubmitting rejected records.
For this reason, file validation and daily control screens are important in clearing software.
