There is no charge (except for cash advances) if the payment is received promptly.

除非预支现金，如能及时付款，无需任何费用。

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There are two modes for charging with the Payment Web service: charge by amount and charge by volume.

存在两种使用支付Web服务进行收费的模式：按流量收费和按批量收费。

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Many applications charge micropayments in situ to add levels and add-ons, and Square, which launched at the very end of 2009, permits almost anyone to accept payment via the iPhone.

许多人抱怨小额支付需要在应用程序上添加额外的层和插件，而在2009年末发布的Square允许几乎所有人通过iPhone接受支付。

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The investigator discovered a program called Kameo was capturing everything that came into Mr. Angelastri's system before it even reached the PC Charge payment software.

WSJ: Hackers New Target: Small Firms With Lax Security

Anybody that pays their bill within 26 days will not be charged the late payment charge.

BBC: NEWS | Programmes | Moneybox | BT apologises for fine confusion

Some payment providers charge hefty fees, arguing that this is the only way to make the economics work given few subscribers and low-value transactions.

ECONOMIST: Online payments