Questions to Ask AP Vendors About Role-Based Access and Permission Boundaries

1. Granularity: How precisely can roles and permissions be defined? 2. Boundaries: Can view, edit, approve, and pay rights be separated? 3. Segregation of duties: Is it enforced by the system, not just optional? 4. Least privilege: Can access be limited to exactly what a role needs? 5. Administration: Who can change roles, and how is that governed? 6. External access: How is vendor or portal access scoped and limited? 7. Auditing: Are access grants and changes logged and reviewable?

Start with how precisely access can be defined. Ask whether roles can be set granularly enough to match your structure, including by entity, department, or function, and whether the system can separate view, edit, approve, and pay rights rather than bundling them.

The boundaries matter because real control depends on them. A system that only offers broad roles cannot enforce the fine separations AP needs, such as letting someone code but not approve, or approve but not pay. Confirming the boundaries can be drawn where you need them is the first test.

The most important question is whether segregation of duties is enforced, not just configurable. Ask whether the system actively prevents one person from coding, approving, and paying the same invoice, or whether it merely allows you to set that up and hope it is maintained. Enforced separation is a far stronger control than optional configuration.

Then ask about least privilege. Confirm that access can be limited to exactly what each role needs, so a coder does not get payment rights and a payment processor cannot change coding. A vendor should be able to explain how the system keeps access minimal rather than over-granting by default.

Administration is its own control point. Ask who can create roles and change permissions, and how that capability is governed, because whoever controls access holds significant power. The answer should show oversight, not unrestricted admin rights.

External access and auditing round out the questions. Ask how access for vendors or other external users is scoped and limited, since a vendor portal should expose only what it should. And ask whether access grants and changes are logged, so you can prove who had what access and when. A system that cannot audit access cannot fully support your controls.

Stampli provides role-based access so coding, routing, approval, and payment responsibilities can be assigned precisely, with each user seeing and doing what their role requires. Segregation of duties between invoice and payment approval is enforced by design, so the core separation is built into the system rather than left to configuration alone.

Access can reflect the organization's structure across entities and departments, and Stampli supports both centralized and decentralized models, so permissions match how teams actually work. The vendor self-service portal scopes external access so vendors interact only with what is appropriate for them.

Every action is captured in an immutable audit trail with full context, which supports reviewing who did what and confirming that the access boundaries held. That makes the role-based access verifiable rather than assumed.