A company is formally adhering to the principles of the UN Global Compact.

UN Global Compact: Companies adhering to the UN Global Compact commit to aligning their operations and strategies with ten universally accepted principles in the areas of human rights, labor, environment, and anti-corruption.

Supplier Non-Compliance: When a key supplier violates these principles, it affects the company's commitment to the Compact.

Best Initial Action:

Do Nothing: This would violate the company's commitment to the Compact.

Replace Supplier: This might be necessary later but is premature without attempting to rectify the situation.

Notify Supplier: Informing the supplier of the non-compliance is essential to give them a chance to correct the issue. This step shows a collaborative approach to compliance.

Require Compliance: Necessary but should follow the notification to provide a reasonable timeframe for compliance.

Conclusion: Notifying the supplier is the most appropriate first step, as it provides an opportunity for the supplier to address the issue and demonstrates the company’s commitment to ethical practices.