warranty
noun
[ ˈwɒr(ə)nti ]
• a written guarantee, issued to the purchaser of an article by its manufacturer, promising to repair or replace it if necessary within a specified period of time.
• "the car comes with a three-year warranty"
• justification or grounds for an action or belief.
• "you have no warranty for such an audacious doctrine"
Origin:
Middle English: from Anglo-Norman French warantie, variant of garantie (see guaranty). Early use was as a legal term denoting a covenant annexed to a conveyance of property, in which the vendor affirmed the security of the title.