
Common law is a body of unwritten laws based on legal precedents established by the courts. It is not written out in one document like an Act of Parliament but draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law, also known as case law, relies on detailed records of similar situations and statutes because there is no official legal code that can be applied to a case at hand. The duty of care is a legal obligation that is imposed on an individual, requiring adherence to a standard of reasonable care to avoid careless acts that could foreseeably harm others and lead to a claim in negligence. A status-based common law duty is a duty imposed on an individual by law, which, if breached, may subject the individual to liability.
| Characteristics | Values |
|---|---|
| Definition | A legal obligation that requires an individual to adhere to a standard of reasonable care to avoid careless acts that could harm others and lead to a claim in negligence. |
| Basis | Based on previous court cases decided by judges. |
| Nature | Unwritten laws based on legal precedents established by the courts. |
| Sources | Draws from institutionalized opinions and interpretations from judicial authorities and public juries. |
| Purpose | To establish consistent outcomes by applying the same standards of interpretation. |
| Adaptability | Allows for interpretation and can be adapted to situations not contemplated at the time of legislation. |
| Jurisdictions | Practiced in the US, UK, Australia, Canada, Hong Kong, India, and New Zealand. |
| Examples | Doctor and patient, manufacturer and consumer, and surveyor and mortgagor. |
| Exceptions | Judicial exceptions may be created if clearly justified based on public policy factors, such as the burden on the defendant and the consequences for the community. |
| Negligence | Violation of a criminal statute may establish "negligence per se," requiring proof of a clear statutory duty, the party obligated, and what constitutes a breach. |
| Disclosure | Disclosure of confidential information generally requires consent but may be permitted in specific circumstances, such as safeguarding or public interest. |
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What You'll Learn

Common law duty of confidentiality
The common law duty of confidentiality is a broad principle that prohibits individuals from disclosing or taking advantage of confidential information without the consent of the disclosing party. This duty arises from a combination of contract law and equity, particularly in relationships such as lawyer-client, doctor-patient, and employer-employee.
In the context of lawyer-client confidentiality, solicitors or attorneys are legally obligated to respect the confidentiality of their clients' affairs. Information obtained by lawyers about their clients is considered confidential and must not be used for the benefit of unauthorised persons. This duty is based on the utilitarian rationale of promoting the work of solicitors and allowing clients to discuss sensitive details freely without fear of subsequent disclosure to the public. The scope of this duty is typically outlined in retainer agreements, and lawyers can only reveal confidential information to third parties with their client's consent.
In the healthcare sector, the common law duty of confidentiality, often referred to as "doctor-patient confidentiality," binds medical professionals from disclosing a patient's medical information without their consent. This duty covers not only the information a patient reveals to the doctor but also the doctor's independent conclusions, opinions, assessments, and medical records. Confidentiality extends to communications between the patient and other professional staff working with the doctor.
The common law duty of confidentiality also applies to employment relationships, where employers have an implied duty of confidence towards their employees due to the nature of the relationship. Trade secrets and commercially sensitive information can be protected by the common law duty of confidence in the absence of a confidentiality or non-disclosure agreement (NDA).
While the duty of confidentiality is crucial, it is not absolute and can be breached or limited by law in certain circumstances, particularly when balancing the interests of the client and the proper administration of justice.
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Common law duty of care
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. Common law is not written out in one document like an Act of Parliament, but instead draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law is practised in the US, the UK, Australia, Canada, Hong Kong, India, and New Zealand.
A duty of care is a legal obligation that is imposed on an individual, requiring them to adhere to a standard of reasonable care to avoid careless acts that could foreseeably harm others and lead to a claim in negligence. This duty of care may be considered a formalisation of the social contract, the established and implicit responsibilities held by individuals/entities towards others within society.
The idea of a general duty of care that runs to all who could be foreseeably affected by one's conduct first appeared in the judgment of William Brett (later Lord Esher), Master of the Rolls, in Heaven v Pender (1883). In tort law, duty of care is the first element that must be established to proceed with an action in negligence. The claimant must be able to show a duty of care imposed by law that the defendant has breached.
An example of duty of care is the common law duty of confidentiality. This duty states that if information is given in circumstances where a duty of confidence is expected to apply, that information cannot normally be disclosed without the information provider's consent. For example, a health or social care provider wishing to disclose a patient's personal information to someone outside their care team should first seek the patient's consent.
Another example is the duty of care owed by landowners to those who come onto their premises. In the 1968 case of Rowland v. Christian, the Supreme Court of California replaced the old classifications of trespasser, licensee, or invitee with a general duty of care to all persons on one's land, regardless of their status.
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Common law duty to rescue
A "duty to rescue" is a concept in tort law and criminal law that arises in several cases, describing a circumstance in which a party can be held liable for failing to come to the rescue of another party who could face potential injury or death without being rescued. The exact extent of the duty varies greatly between different jurisdictions. In common law systems, it is rarely formalized in statutes that would bring the penalty of law upon those who fail to rescue. However, this does not negate a moral duty to rescue, as there are separate ethical arguments for a duty to rescue even where the law does not punish failure to rescue.
In common law, there are certain relationships that impose a duty to rescue, such as that between common carriers and their passengers, employers and their employees, and spouses. In some US jurisdictions, real property owners have a duty to rescue invitees but not trespassers from all reasonably foreseeable dangers on the property. Other jurisdictions, such as California, extend the duty to rescue to all persons who enter upon real property, regardless of their classification as invitees, social guests, or trespassers.
Some states have laws that impose a duty to assist people in need, which vary from state to state. For example, in Wisconsin, if an individual knows that a crime is being committed and that a victim may suffer bodily harm, they have a duty to call the police or provide assistance. In Minnesota, if a person is at the scene of an emergency and knows that someone has suffered or could suffer grave physical harm, they have a duty to give "reasonable assistance", which can mean calling or attempting to call emergency services.
In certain cases, if an individual initiates a rescue attempt, they may be held liable if they are negligent in their rescue attempt. For example, in Zelenko v. Gimbel Bros., Inc., a 1935 New York State case, the court found that shop owners who began to render medical assistance to an ill customer but then left her alone for many hours after initially rendering care, were liable for her death under a standard of negligence.
Civil law systems, which are common in Continental Europe, Latin America, and much of Africa, impose a far more extensive duty to rescue. The duty is usually limited to doing what is "reasonable", meaning that a helper does not have to substantially endanger themselves.
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Common law duty in tort law
In tort law, a duty of care is a legal obligation imposed on an individual to uphold a standard of reasonable care to avoid careless acts that could foreseeably harm others and lead to a claim in negligence. This duty of care is the first element that must be established to proceed with an action in negligence. The claimant must be able to show that the defendant has breached a duty of care imposed by law. This duty may be imposed by operation of law between individuals who have no current direct relationship but eventually become related in some manner, as defined by common law (case law).
At common law, duties were once limited to those with whom one was in privity, as seen in the case of Winterbottom v. Wright (1842). However, in the early 20th century, judges began to recognise that enforcing the privity requirement in product liability cases could lead to harsh results for consumers. The concept of a general duty of care that applies to all who could be foreseeably affected by one's conduct emerged in Heaven v Pender (1883).
While the idea of a general duty of care is now widely accepted, there are differences among common law jurisdictions regarding the specific circumstances under which this duty arises. Courts must balance imposing liability with reasonable limits, as expressed by Justice Cardozo. The existence of a duty of care is determined by analogous cases where courts have previously held the existence or absence of such a duty, such as in relationships between doctors and patients, manufacturers and consumers, and surveyors and mortgagors.
In the context of tort law, negligence per se refers to the breach of a pre-existing common law duty, such as a duty to rescue, by violating a criminal statute. For instance, in Osborne v. McMasters (1889), the court considered the violation of a criminal statute as proof of breaching a civil duty. To establish negligence per se, the statutory duty must be clear, specifying the required conduct or duty, who must perform it, and what constitutes a breach.
Tort law, also known as the law of delict in Scots and Roman Dutch law, addresses private wrongs and aims to compensate victims for harm caused by others. It focuses on civil liability, which is primarily established through precedent and theory rather than an exhaustive code, although the underlying principles are derived from Roman law. Torts can include a range of topics, such as automobile accidents, defamation, product liability, and environmental pollution.
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Common law duty in criminal law
In criminal law, a common law duty refers to the legal obligation to act or refrain from acting in a particular way, with the failure to do so resulting in criminal liability. This duty can arise from various sources, including an individual's status, statutory laws, contracts, or specific relationships.
For example, in the context of landowner liability, the common law duty of care varied depending on whether an individual was a trespasser, licensee, or invitee. However, this classification has been abolished in some jurisdictions, such as England's Occupiers Liability Act 1957, which established a general duty of care towards all persons on one's land.
In tort law, a duty of care is a fundamental concept, imposing a legal obligation on individuals to exercise reasonable care to avoid causing foreseeable harm to others. A breach of this duty can lead to negligence claims and potential liability. The duty of care may extend to individuals who are not in a direct relationship but are connected through common law or case law.
Common law duties can also arise from specific relationships, such as the fiduciary duty in a trustee-beneficiary relationship, where the trustee is legally obligated to act in the best interest of the beneficiary. Professionals, such as doctors and lawyers, are also subject to common law duties, requiring them to provide services that meet established standards of care.
Additionally, common law duties can be established through statutes, where criminal statutes call for criminal punishment for their violation. For instance, the violation of a criminal statute prohibiting theft or assault constitutes a criminal offence and a breach of the common law duty.
In summary, common law duties in criminal law encompass a range of obligations, arising from status, statutes, contracts, and relationships, with the ultimate goal of ensuring individuals act responsibly to prevent harm and adhere to the standards of behaviour required by law.
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Frequently asked questions
Common law is a body of unwritten laws based on legal precedents established by the courts. A status-based common law duty is a legal obligation imposed on an individual based on their status in a given situation. For example, in the case of landowners, their duty of care toward someone on their premises varied depending on whether the person was a trespasser, licensee, or invitee.
One example of a status-based common law duty is the duty of a mother to rescue her child. Another example is the duty of a health or social care provider to seek the consent of a patient/client before disclosing their personal information to anyone outside the care team.
A status-based common law duty is established through the jurisprudence of common law and is based on precedent. This means that judges presiding over a case determine which precedents apply to that particular case. The idea of a general duty of care that runs to all who could be foreseeably affected by one's conduct was first introduced in the judgment of Heaven v. Pender (1883).

































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