PROBLEM TO BE SOLVED: To provide a method by which an introductory instruction contact procedure can be completed whenever an introductory instruction contract is needed even when it is not decided whether the introductory instruction contract should be signed at the time of purchase of a business program.;SOLUTION: A sale box containing an introductory instruction contract document is placed at a store, an introductory instruction contract identification number is given to the document, which is sold at a price corresponding to the introductory instruction charge, so that the introductory instruction contract can be signed while related by using a database based on the identification number sent to the contract source.;COPYRIGHT: (C)2001,JPO
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