An Action Plan Template targeted at Account is the appropriate configuration because Grants Management due diligence is performed against the grantseeking organization represented by the Account record.
Salesforce explicitly recommends using Action Plans on Accounts to define due-diligence steps, required tasks, and documentation that must be collected and verified.
The Action Plan Template acts as the reusable blueprint. It can include Tasks for activities such as validating organization details and Document Checklist Items for collecting statutory or financial documentation. When the template is published, grant managers can instantiate separate Action Plans against an Account, allowing multiple due-diligence processes to proceed in parallel while retaining their own tasks, ownership, deadlines, and verification records. Salesforce specifically supports Account as the target object when creating Grants Management due-diligence Action Plan Templates. An individual Action Plan is an execution instance rather than the reusable configuration requested in the scenario. Path is designed to guide records through stages, and Support Processes control Case status values; neither provides the structured task-and-document framework required for organizational due diligence.
Study Guide References: Grants Management; Due Diligence; Action Plan Templates; Accounts; Tasks; Document Checklist Items; Verification Checks.