Ajuda p/o campo (SWISUP3) 

This field is related to the activity code KSW – Switzerland.
This is an extra field which can be activated in the Payment entry type definition. It can be used when Swiss bank or PostFinance files are generated. It allows to enter additional bank charge instructions like Shared, Beneficiary or Applicant.
Possible usage also depends on the payment transaction type to be generated in the bank file as not all payment transaction types support bank charge instructions.