The nikah mut'ah consists of a verbal or written contract in which both parties agree the length of time and conditions for the marriage.

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Liquidated damages are set to an amount the parties designate during the formation of a contract for an injured party to collect as compensation upon a specific breach of the agreement.

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In fact, the contract between the two parties gives Facebook a large share of the sale of virtual goods sold.

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In addition, rental must be fixed and known by the parties (or ascertainable by means of a formula) at the beginning of a contract.

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Swaps are privately negotiated trades between two parties to exchange cash flows on specified payment dates during the agreed-upon life of the contract.

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Mentors and mentees meet approximately once a month and together both parties draw up a contract and set specific goals to be met within a defined period of time, from 6 to 12 months.

UNESCO: Social and Human Sciences