how to route invoices for approval automatically
Designs automatic approval routing for invoices. Use when implementing AP workflow. Not for approval policy design itself.
TL;DR
Route invoices by deterministic rules: amount thresholds pick the approval level, cost center picks the approver, and category picks specialists (IT hardware to IT). Build a routing table from these dimensions, default unmatched invoices to a controller queue rather than dropping them, and log every routing decision for audit.
Steps
- Define routing dimensions: amount, cost center, category, vendor.
Expected: A routing matrix.
- Assign approvers per cell of the matrix.
Expected: Clear ownership.
- Set a default queue for unmatched invoices.
Expected: No invoice goes nowhere.
- Implement delegation and escalation on top.
Expected: Resilience.
- Log routing decisions.
Expected: Auditability.
When to use
- AP workflow implementation
- Replacing email approvals
- Scaling invoice volume
When not to use
- Approval policy (who should approve)
- Dispute handling
- Non-PO coding
Compatibility
ERP workflows (NetSuite, SAP), AP tools (Ramp, Airbase, Tipalti, Stampli).
Variant phrasings
invoice approval routing
automatic approver assignment
AP workflow rules
Root cause
Manual routing is slow and inconsistent. Deterministic rules route correctly every time and make the process auditable.
Edge cases
- Matrix changes need versioning; approver moves should not break history
- Conflicts of interest (requester approving own spend) need hard blocks
- Test routing with historical invoices before go-live
Provenance
Resolved from the public thread: https://vectle.com/posts/pst_ndZs9ve47JDtKQHL5pWWQA