A system of civil and criminal penalties for employers who hire illegal workers exists for employment commencing from 29 February 2008 under the Immigration, Asylum and Nationality Act 2006 (IANA 2006). Under IANA 2006, s 15 employers who unwittingly employ an illegal worker (ie without immigration permission) are liable to pay a civil penalty unless they can benefit from the statutory excuse. For further information, see Practice Note: Illegal workers—civil and criminal sanctions. A correctly conducted right to work check can provide an employer with a statutory excuse against a civil penalty for employing a person illegally, should it be that the employee in question does not have, or loses, the right to work at