Individuals and businesses purchase insurance policies to protect against monetary losses. In the event of a loss, policyholders submit claims, or requests for payment, seeking compensation for their loss. Adjusters, appraisers, examiners, and investigators work primarily for property and casualty insurance companies, for whom they handle a wide variety of claims alleging property damage, liability, or bodily injury. Their main role is to investigate the claims, negotiate settlements, and authorize payments to claimants, all the while mindful not to violate the claimant’s rights under Federal and State privacy laws. They must determine whether the customer’s insurance policy covers the loss and how much of the loss should be paid to the claimant. Although many adjusters, appraisers, examiners, and investigators have overlapping functions and may even perform the same job, the insurance industry generally assigns specific roles to each of these claims workers.

Contract theory comprises many different theories and various interpretations of the various body of rules and subrules that define Contract Law.

Classical contract theory is the set of ideas and assumptions that underpinned the development of contract law in England and the United States during the 19th century. During this period, the prevailing liberal individualist philosophy of laissez faire elevated contract to a position of central importance in the law.

Elderly care or elder care is a broad term encompassing such services as assisted living, adult day care, long term care, nursing homes, hospice care, and Alzheimer's care.