Quietus – this term comes from Latin and is used in Litigation Procedures, where describes every legal action, which settles/terminates a debt or obligation. For example this could be court agreement, concluded by the parties and confirmed by the judge.
*Note that it is advisable to hire a lawyer who to draw or examine your contract. Lawyers are qualified in Law and they know what terms and conditions should be implemented in such legal binding forms to protect the interests of disputing parties.