A concluded agreement in relation to financial matters, usually in the form of a draft Consent Order which has not yet been approved by the Court, which the parties are bound by and which either can apply to be converted into a Court Order. The agreement is such that neither party can seek to renege on its terms, unless there are substantial vitiating factors such as non-disclosure or a lack of legal advice. Named after the case of Xydhias v Xydhias [1999] 1 FLR 683.