This concise, practical guide will be the go-to text for financial remedy practitioners. It will provide a clear explanation of the applicable legal principles involved in drafting and implementing the terms of prenuptial or postnuptial agreements (and the civil partnership equivalents). This text will also provide insightful tips on avoiding common pitfalls. It will also be an essential reference for those faced with an agreement that one party seeks to depart from, with straightforward and practical considerations for clients on both sides. All recent case law and procedural developments will be carefully analysed, making this an authoritative and user-friendly reference book.