Ability to provide SEPA information

[carstenblt]

For direct debit we would need to set CreditorReferenceID, PayerPartyDebtorFinancialAccount, DirectDebitMandateID. ERPNext does not provide a data model for this, but you could maybe add an option to use a custom field in the Invoice doc?

For a SEPA transfer it would be PayeePartyCreditorFinancialAccount.IBANID, PayeePartyCreditorFinancialAccount.BICID, PayeePartyCreditorFinancialAccount.AccountName. I think ERPNext does not link a "Bank Account" doc to a Payment Term, so this would have to be configured differently too.