In a contract of kafalah (or kifalah), it is the party who provides assurances as to the performance of an original party to a commutative contract or accepts to stand surety. In other words, a kafil is the one who joins his liability to that of the principal (makful or makful anhu) in claims regarding debts, personal injury or material assets.

Kafil is also spelled “kafeel“.

Kafil is an Arabic word for guarantor.