GUARANTEE SYSTEM AND METHOD

To maintain a normal commercial flow while preventing an increase in a burden of payment by a guarantee business operator to a supplier due to an occurrence of an unanticipated compartment failure.SOLUTION: A guarantee business operator computer includes a first notification unit, a second notification unit, and a third notification unit. A supplier computer includes a management unit that manages an amount of a pooled fund to be applied to a payment of a billing amount of an invoice. The supplier computer adds an amount corresponding to a first payment to the amount of the pooled fund when a notification is made about an occurrence of the first payment (S102), adds an amount corresponding to a second payment to the amount of the pooled fund when a notification is made about an occurrence of the second payment (S104), and subtracts the billing amount of the invoice from the amount of the pooled fund when a notification is made about an issuance of an invoice (S107).SELECTED DRAWING: Figure 4 【課題】通常の商流を維持しつつ、予期できない部品故障の発生によって、供給業者に対する保証業者の支払い負担が増大することを防止する。【解決手段】保証業者コンピュータは、第１通知部と、第２通知部と、第３通知部とを備える。供給業者コンピュータは、請求書の請求額の支払いに充当するためのプール金の金額を管理する管理部を備え、第１支払いの発生が通知されたときにプール金の金額に第１支払いに対応する額を加算し（Ｓ１０２）、第２支払いの発生が通知されたときにプール金の金額に第２支払いに対応する額を加算し（Ｓ１０４）、請求書の発行が通知されたときに、プール金の金額から請求書の請求額を減算する（Ｓ１０７）。【選択図】図４