Mandatory
This field specifies the underlying currency, ie, the currency specified in field 23, and amount. The underlying currency is the currency which is to be exchanged for the counter currency.
Currency must be a valid ISO 4217 currency code (Error code(s): T52).
The integer part of Amount must contain at least one digit. A decimal comma is mandatory and is included in the maximum length. The number of digits following the comma must not exceed the maximum number allowed for the specified currency (Error code(s): C03, T40, T43).