Furthermore, at the time when an estimate sheet is signed (even if the space for the actual costs is blank) during advance arrangements with a funeral home, a 'contract in which additional payments for necessary costs has been agreed upon' has been established.
なお、葬儀社との打合せ時に、（たとえ実費金額欄が空欄であっても）見積書にサインをした時点で「必要分追加を認めるとみなした契約」が成立する。