warrandice

an undertaking, usually in the form of a ‘clause of warrandice ‘in a grant, whereby the person making the grant promised to maintain and support the grantee in the property or right granted him, against all challenges made to his right or impediments concerning it which might arise after the grant was made.  ‘Real warrandice’ was an undertaking that if the grantee were to lose his right to what had been granted, then the granter would grant him something else of equal value.