Payee identifier shall occur maximum once, if the Payee is different from the Seller
cac:PayeeParty(count(cac:PartyIdentification/cbc:ID[upper-case(@schemeID) != 'SEPA']) <= 1) and ((cac:PartyName/cbc:Name) != (../cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity/cbc:RegistrationName))