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                **第八十九條 定金及其法律效力** 當事人可以約定一方向對方給付定金作為債權的擔保。債務人履行債務后,定金應當抵作價款或者收回。給付定金的一方不履行約定的債務的,無權要求返還定金;收受定金的一方不履行約定的債務的,應當雙倍返還定金。 **第九十條 定金的成立** 定金應當以書面形式約定。當事人在定金合同中應當約定交付定金的期限。定金合同從實際交付定金之日起生效。 **第九十一條 定金的數額** 定金的數額由當事人約定,但不得超過主合同標的額的百分之二十。
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