The MOST critical requirement to include in the contract is the confidentiality of customer data, because it is a legal and ethical obligation of the bank to protect the privacy and security of its customers’ personal and financial information. Outsourcing the statement printing function to an external service provider exposes the customer data to potential unauthorized access, disclosure, or misuse by the service provider or its sub-contractors. Therefore, the contract should specify the terms and conditions for the handling, storage, and disposal of the customer data, as well as the penalties for any breach of confidentiality. The other options are not as critical as the confidentiality of customer data, because:

Option A: Monitoring of service costs is an important requirement to ensure that the service provider delivers the statement printing function within the agreed budget and scope, but it is not as critical as the confidentiality of customer data, which has legal and reputational implications for the bank.

Option B: Provision of internal audit reports is a useful requirement to verify that the service provider complies with the internal and external standards and regulations for the statement printing function, but it is not as critical as the confidentiality of customer data, which is a core value of the bank and its customers.

Option C: Notification of sub-contracting arrangements is a relevant requirement to ensure that the service provider does not delegate the statement printing function to another party without the bank’s consent and oversight, but it is not as critical as the confidentiality of customer data, which is the primary responsibility of the bank and its service provider. References = Risk and Information Systems Control Study Manual, 7th Edition, ISACA, 2020, p. 197.