フィクサー
アメリカでは悪徳弁護士もフィクサーと呼ばれている。アメリカの弁護士をフィクサーと呼ぶのは、裁判の始まる前に自分の陣営に不利となる証拠と証人を裁判から外す手段 (skill) を知っている事から指す（fixとは物事を意図的にarrangeする意味がある）。相手の有利な手札を察知されないようにして抜き取る一方で不利なクズ札を混ぜておくため、結果として敗北を嫌う相手が訴訟を降りて裁判が消滅することも珍しくない。
防諜
A double agent is a person who engages in clandestine activity for two intelligence or security services (or more in joint operations), who provides information about one or about each to the other, and who wittingly withholds significant information from one on the instructions of the other or is unwittingly manipulated by one so that significant facts are withheld from the adversary. Peddlers, fabricators, and others who work for themselves rather than a service are not double agents because they are not agents. The fact that doubles have an agent relationship with both sides distinguishes them from penetrations, who normally are placed with the target service in a staff or officer capacity.