Designing AP Roles for Coders, Routers, Authorizers, Approvers, and Payment Processors

1. Map the workflow: identify each step from coding to payment. 2. Define each role: state what each role can do and see. 3. Apply least privilege: grant only the access each role needs. 4. Separate duties: keep coding, approval, and payment in different hands. 5. Set authority limits: tie approval rights to amount and scope. 6. Govern administration: control who can change roles and configuration. 7. Review access: revisit roles as people and structures change.

Each role owns a part of the invoice's journey. A coder classifies the invoice, assigning the GL account, dimensions, and entity. A router ensures the invoice reaches the correct approver based on coding and the authority matrix. An authorizer or approver signs off within their approval limits, and a payment processor executes the payment once the invoice is approved.

Defining these clearly gives every step an owner. When roles are vague, work falls between them, and accountability blurs. Clear role definitions make it obvious who is responsible for coding accuracy, routing correctness, approval, and disbursement.

The organizing principle is segregation of duties. The same person should not be able to enter or code an invoice, approve it, and pay it, because that concentration lets one individual move money without a second check. Splitting these responsibilities across roles is the core control.

This shapes the whole design. A coder should not approve their own coding into payment, an approver should not also release the payment, and a payment processor should not be able to alter the underlying invoice or approval. Each separation removes a path by which an error or a fraud could pass unchecked.

Beyond separation, each role should follow least privilege, meaning it gets only the access required for its work. A coder does not need payment rights, and a payment processor does not need to change coding. Limiting access to what each role needs reduces both mistakes and the attack surface.

Administration is its own control. Whoever can create roles, change permissions, or alter approval rules holds significant power, so that capability should be tightly held and itself subject to oversight. Access should also be reviewed as people change jobs and the organization changes, so roles do not accumulate stale privileges.

Stampli provides role-based access so coding, routing, approval, and payment responsibilities can be assigned to the right people, with each user seeing and doing what their role requires. Segregation of duties between invoice approval and payment approval is enforced by design, which builds the core control into the workflow rather than relying on manual discipline.

Because Stampli supports both centralized and decentralized work, roles can reflect how a team actually operates across entities and departments, while the ERP remains the system of record. Approval authority can be configured to match the organization's authority matrix.

Every action is captured in an immutable audit trail with full context, so who coded, routed, approved, and paid each invoice is on the record. That makes the role design verifiable, since the audit trail shows the separations holding in practice.