West Sayville Real Estate Lawyer, New York

Principles of international law so fundamental that no nation may ignore them or attempt to contract out of them through treaties. For example, genocide and participating in a slave trade are thought to be jus cogens.

A provision in a lease that absolves the landlord from responsibility for all damages, injuries or losses occurring on the property, including those caused by the landlord's actions. Most states have laws that void exculpatory clauses in rental agreements, which means that a court will not enforce them.

A type of bond (an interest-bearing document that serves as evidence of a debt) that does not require security in the form of a mortgage or lien on a specific piece of property. Repayment of a debenture is guaranteed only by the general credit of the issuer. For example, a corporation may issue a secured bond that gives the bondholder a lien on the corporation's factory. But if it issues a debenture, the loan is not secured by any property at all. When a corporation issues debentures, the holders are considered creditors of the corporation and are entitled to payment before shareholders if the business folds.

A legal doctrine that prevents a plaintiff who has acted unethically in relation to a lawsuit from winning the suit or from recovering as much money as she would have if she had behaved honorably. For example, if a contractor is suing a homeowner to recover the price of work he did on the home, his failure to perform the work as specified would leave him with unclean hands.

A way for married couples to hold title to property, available in Arizona, California, Nevada, Texas and Wisconsin. It allows one spouse's half-interest in community property to pass to the surviving spouse without probate.

A meeting of the minds. An agreement is made when two people reach an understanding about a particular issue, including their obligations, duties and rights. While agreement is sometimes used to mean contract -- a legally binding oral or written agreement -- it is actually a broader term, including understandings that might not rise to the level of a legally binding contract.

A right to property that cannot be enforced in the present, but only at some time in the future. For example, John's will leaves his house to his sister Marian, but only after the death of his wife, Hillary. Marian has a future interest in the house.

A phrase used in property law to describe a right or duty that remains with a piece of property no matter who owns it. For example, the duty to allow a public beach access path across waterfront property would most likely pass from one owner of the property to the next.

The act of changing a written contract when one of the parties can prove that the actual agreement was different than what's written down. The changes are usually made by a court when both parties overlooked a mistake in the document, or when one party has deceived the other.