What could be an example of a custom business rule in SAP MDG?

The choice regarding customer records including a valid tax identification number exemplifies a custom business rule in SAP Master Data Governance (MDG) because it represents a specific requirement that an organization may impose to ensure compliance with legal and regulatory standards. Enforcing a valid tax identification number is critical for accurate tax reporting and facilitates the organization's dealings with government authorities.

Such rules are often tailored to align with the unique operational requirements of a business or industry, underscoring the importance of capturing particular data elements that support business processes. In this case, the tax identification number serves as an essential element that validates the identity of customers in tax-related transactions and reporting.

Other options may reflect general data governance practices but do not encapsulate custom business rules in the same way. For instance, requiring a photo ID for customer records or supplier ratings for product entries might not be universally applicable or enforceable within every business context. Similarly, the necessity of manual verification of all records may reflect a broader process rather than a specific, defined business rule tailored to a company's unique needs. This makes the requirement for a valid tax identification number stand out as an example of a tailored approach to governance in master data management.