Field help (BSISNS) 

This field indicates whether the transaction amount is a Revenue (credit) or an Expense (debit).
A bank sign C (credit) in MT940 or CRDT (credit) in CAMT.053/.054 represents payments received and displays as Revenue.
A bank sign D (debit) in MT940 or DBIT (debit) in CAMT.053/.054 represents payments issued and displays as Expense.