DocketX / Glossary / memorandum of law
A memorandum of law is a written document you file with the court that explains the legal reasons why the judge should decide a specific issue in your favor.
It is a formal legal argument, also called a legal brief or memo, that cites relevant legal principles (but no specific case names or statutes here) to support your position. You typically submit it before a hearing or trial to persuade the court on how the law applies to the facts of your case.
It matters because the judge will rely on your memorandum to understand the legal grounds for your request, and a well-written memo can clarify complex issues. If you fail to file it on time or properly, the court may not consider your legal arguments, potentially harming your case.
Many people think a memorandum of law is the same as a simple letter or summary of the case. In reality, it is a structured legal document that must follow court rules and present reasoned argument, not just facts or opinions.
Get the actual rule
This page explains the concept. When it matters to your case, read the rule that governs it in your court — we hold Texas, federal and Washington court rules word for word, and every state's official resources are on the state pages. If someone cites a case at you, check that it exists first.
Related
General explanation, not legal advice, and not specific to any state — procedures and deadlines vary by jurisdiction and court. If you can get a lawyer or free legal aid, do: every real option.