Retained recruiters work for the organizations who are their clients, not for job candidates seeking employment, in some countries, such as the UK, recruiters are not legally permitted to charge candidates. In the U.S. job candidates may pay an up front retainer to a consulting or career counseling firms to assist them in their job search. Search firms generally commit to "off-limits" agreements. These agreements prevent a firm from approaching employees of their "current" clients as candidates for other clients (for instance, if a headhunter recruits the new CEO into Boeing, they will agree not to recommend Boeing executives to other companies). Since they act as management consultants working in the best interests of the clients for whom they conduct searches, it would be counterproductive to simultaneously remove talented executives from those client companies. Search firms may decline assignments from certain companies, in order to preserve their ability to recruit candidates from those companies. Some large search firms may insist on guarantees of a certain number or dollar value of searches before they will put an entire company "off-limits".