A more thorough explanation:

Definition: Laesio Enormis (lee-shee-oh i-nor-mis) is a term used in Roman and civil law to describe the sale of a thing for which the buyer paid less than half its real value. It can also refer to the injury sustained by one party to an onerous contract when the overreaching party receives twice the value of that party's money or property.

Examples:

• If a seller sells a piece of land for less than half its real value, the buyer can keep the land by paying the full value, or the seller can rescind the sale.
• If a purchaser pays less than half the value of a property sold, or a seller receives more than double the property's value, laesio enormis may exist.
• In Louisiana, laesio enormis may exist when a purchaser pays less than one-fourth of the value of property sold by coowner coheirs.

The examples illustrate how laesio enormis is used to protect parties from unfair contracts or sales. If a buyer pays significantly less than the real value of a property, the seller can rescind the sale or the buyer can pay the full value to keep the property. Similarly, if a seller receives significantly more than the value of the property sold, the injured party can seek relief under laesio enormis. This doctrine is used to ensure that contracts and sales are fair and equitable for all parties involved.