For the Lookup Bic action it makes more sense to set the passthrough as a configuration item.

At the moment the passthroug (default to be used if no BIC found) is a parameter, which means you either have to pass the value as a parameter to the Form Processor using the action or use a Set Value action before the lookup. IMO it would be better to have a string as a configuration item so you can add a default value OR use a parameter?