The Send Documents flow for Retail Banking is the appropriate standard capability because the business problem centers on sending customer documentation through a controlled Financial Services process while giving service representatives a consistent Salesforce-based experience.

Salesforce provides several preassembled flows for common Retail Banking and Insurance service requests through the Financial Services flow package. These flows are delivered as standard templates that organizations can clone and customize to match their service processes.

The Send Documents flow includes a predefined list of commonly used documents. Administrators can extend that list directly by modifying the Correspondence Selection screen and adding document choices. This means the institution can tailor the standard flow to its required banking documents while keeping service execution within the Agentforce Financial Services environment.

A Marketing Cloud integration would primarily address communication campaigns rather than the underlying retail-banking service process. Process Builder is not the appropriate architecture for this guided document workflow, and custom Apex introduces unnecessary code when Salesforce already provides a configurable standard flow.

Using the Retail Banking flow centralizes the service process and reduces dependence on disconnected tools, giving agents a consistent workflow for handling customer-document requests and helping the organization standardize document-related interactions.