# accounts-payable: obligations What this system promises, and to whom. A change here needs the steward and the business owner. ## To vendors - An invoice that matches its PO and receiving is paid within terms (net 30 unless the PO says otherwise). - A held invoice is held for a stated reason the vendor can be told in one sentence. ## To the stores and buyers - Goods are paid only for the quantity received. A short shipment is held, not paid in full. - A price over the PO by more than 2% or $50 goes back to the buyer who raised the PO. ## To the Controller and the auditors - No payment to a changed bank account without a callback to a number already on file. - Only the AP lead or the Controller may clear a vendor-change or a possible duplicate, whichever tool they sign from (`people.yaml`). A clerk may pay, hold, or send a price back to the buyer. - Every decision the machine made alone is written to `queue/` as inferred; every decision a person made is signed and declared. Nothing inferred is ever presented as proven. ## To whoever does this job next - The labeled examples in `eval/` are the definition of correct. A successor, a new model or a new tool is accepted when it agrees with them at the recorded bar, and not before.