{
  "specifications": [
    "An invoice requires both an existing purchase order and a receipt record before automatic payment.",
    "An invoice variance of exactly EUR 10 is within tolerance.",
    "An invoice variance above EUR 10 blocks automatic payment.",
    "For a blocked invoice, an Accounts Payable analyst may ask for a corrected invoice but is not obliged to ask.",
    "Only the receiving team records goods receipt; Accounts Payable cannot record goods receipt.",
    "The person who changed supplier bank details must not approve payment to those details.",
    "For a service invoice, an authorised service acceptance replaces the goods receipt record.",
    "Service acceptance does not replace the purchase-order requirement.",
    "A dispute freezes the payment clock until the dispute is resolved.",
    "After dispute resolution, the payment clock resumes from its paused value rather than restarting at zero.",
    "An invoice number is unique only within a supplier; different suppliers may reuse the same number.",
    "The tolerance is assessed per invoice, not against the monthly sum of a supplier invoices."
  ]
}