It thus resembles both conversion to other religions and naturalization.[1][2] The procedure and requirements for conversion depend on the sponsoring denomination. A conversion in accordance with the process of a denomination is not a guarantee of recognition by another denomination.[2] Usually the conversions performed by the more stringent denominations are recognized by the less stringent ones, but not the other way around. A formal conversion is also sometimes undertaken by individuals whose Jewish ancestry is questioned or uncertain, even if they were raised Jewish, but may not actually be considered Jews according to traditional Jewish law.[3]