Property law balances individual ownership rights with public interests through several key doctrines. Eminent domain is the government's power to take private property for public use under the 5th Amendment's Takings Clause, provided that just compensation is paid to the owner, with courts interpreting "public use" broadly enough to include certain economic development projects. A lien is a legal claim or right against property used as security for a debt or obligation, common examples being mortgage liens, mechanic's liens, and tax liens, with lienholders having the right to seize or sell the property if the debt is not repaid. An easement is a legal right to use another person's land for a specific purpose, such as utility lines or driveways, and easements typically "run with the land," surviving changes in ownership. Adverse possession allows a person to claim ownership of land they have occupied openly, continuously, exclusively, hostilely, and without permission for a statutory period, an unusual but well-established path to title.
Estate planning and probate law address how property is managed and transferred at death. Probate is the legal process of administering a deceased person's estate, including validating the will, inventorying assets, paying debts and taxes, and distributing remaining property to beneficiaries under court supervision. An executor, named in the will, handles these duties, while intestate succession governs the distribution of an estate when no valid will exists, with state laws determining how property is divided typically among the surviving spouse, children, parents, and other relatives in a specific order. A trust is a fiduciary arrangement in which a trustor transfers assets to a trustee who manages them for designated beneficiaries, useful for estate planning, asset protection, and tax purposes. The fiduciary role applies broadly to anyone holding a legal or ethical relationship of trust who must act in the best interests of another, including trustees, attorneys, and corporate officers. A power of attorney is a legal document authorizing one person (the agent or attorney-in-fact) to act on behalf of another (the principal), and a guardian ad litem may be appointed by the court to represent the best interests of a minor or incapacitated person during legal proceedings.
Several specialized legal concepts complete the modern practitioner's vocabulary. Sovereign immunity is the doctrine that the government cannot be sued without its consent, although statutes such as the Federal Tort Claims Act waive immunity in certain circumstances to allow suits for government negligence. A class action lawsuit allows one or more plaintiffs to sue on behalf of a larger group sharing common claims, efficiently resolving cases involving many similarly situated individuals such as in product defect or securities fraud disputes. Intellectual property refers to creations of the mind protected by law, with patents covering inventions, trademarks protecting brand identifiers, copyrights safeguarding creative works, and trade secrets shielding confidential business information. Other practical tools include the cease and desist letter (a formal written demand to stop allegedly illegal activity, often preceding litigation), garnishment (a legal process by which a creditor collects a debt by directing a third party such as an employer to withhold and remit funds, subject to federal and state limits), and the litigation hold (a directive to preserve relevant documents and data when litigation is reasonably anticipated, with failure resulting in sanctions). Forum shopping describes the practice of choosing a court likely to provide a favorable outcome, sometimes countered by the doctrine of forum non conveniens allowing courts to transfer cases to prevent abuse. Finally, attorneys often take cases pro bono, Latin for "for the public good," providing free legal services to those who cannot afford representation, a professional responsibility many bar associations encourage or require annually.