The current descriptions of the usage for /balance and /transactions should be adjusted, as the error code for not finalized day is deprecated and description is not precise enough.
Here my suggestions:
/transactions
Retrieves the list of transactions for the current day, if called without a date.
Retrieves the transaction list for a specific day, if called for a past date. In case the specified day is not yet finalized, the response code will be 202.
/balance
Retrieves the intraday booked balance (ITBD) for the current day, if called without a date.
Retrieves the closing booked balance (CLBD) for a specific day, if called for a past date. In case the specified day is not yet finalized, the response code will be 202.
The current descriptions of the usage for /balance and /transactions should be adjusted, as the error code for not finalized day is deprecated and description is not precise enough. Here my suggestions:
/transactions
/balance