Payment Validations - Document Payee Tax Registration

Oracle Fusion provides standard validations for Document, Payment, and Payment File processes. However, there is currently no delivered validation for the "Document Payee Tax Registration" field.

How can we configure a custom validation for the "Document Payee Tax Registration" field to ensure that only payees with a valid tax registration number are included in the payment outbound file? Please advise on recommended approaches for implementing this validation, the appropriate stage in the payment process for applying it, and best practices for handling exceptions and ensuring compliance.