1940年，每月一次的支票开始流通。
旅行支票通常是小面额，比如十、二十美元，五、十英镑，用于零星支付，在流通中没有时间限制。
Traveler's checks are generally of small face value, such as ten or twenty dollars, five or ten pounds, for miscellaneous payments. There is no time limit of their circulation period.
历史上，银行业既掌握着硬件（支票簿和贷/借记卡），有控制着流通机构（分支企业，网站等等）。
Historically, banks have controlled both the hardware (chequebooks and debit/credit cards) and the distribution (branches, websites, etc).
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