Split TDN
Splitting a TDN is as getting change for paper money. The difference is that TDN do not come in predefined denominations. A TDN is split in two TDNs with a total equal with the original TDN. The Central Bank can set the fraction of TDN to hundreds (cents) or any other value.
Sometimes it is necessary to split a TDN in two TDNs in order to make a payment or transfer. This can be done using the Central Bank website. TDN Applications perform a split for an amount necessary to make a payment. The original TDN is canceled, one split is used for the payment and the second remains in the possession of the TDN holder using the application.
Banks and merchants prefer to keep only one TDN for a larger value and split a smaller value TDN when necessary. When receiving a TDN it is consolidated in the larger, existing TDN.
The Split transaction is very fast, requiring only a few database operations. When the TDN is protected by a PIN or PKI some small amount of processing . If any of the steps of the transaction failed the API Call will return an error message.
