| 摘要 |
PROBLEM TO BE SOLVED: Toprevent the illegal usage of a pre-paid card by preventing the alteration of a card. SOLUTION: A prepaid card 100 for pachinko game is provided with an illegal competition preventing part 3 constituted of a bar code on a card edge face in addition to a punch hole piercing part 2 on a card surface for preventing the alteration of the pre-paid card. Thus, an illegal competition can be prevented doubly by the punch hole piercing part 2 and the illegal competition preventing part 3. Also, the illegal competition can be further prevented by making it difficult to alter the card edge face. |
