The athlete also must return his passport within 24 hours after his return to South Africa.

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When the cost of capital goes up, the return on capital must also increase, or the economy will liquidate itself.

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For financials, the Buffett-based approach also looks at the return on assets rate, which must average at least 1% over the past 10 years.

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Also keep in mind that with charter, one must pay to return the aircraft to its point of origin, so one-way trips must be priced on a round-trip basis.

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There must also be a statement as to the value of anything you received in return or a statement that there was not anything given to you in return.

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On top of being required to return shares to the lender they borrowed them from, shorts also must pay dividends on those shares.

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They must also answer a series of questions on Schedule B to their U.S. income tax return asking them about foreign financial accounts.

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