Law of Agency Cheat Sheet for RES Exam Revision

A RES agency relationship exists when an agent is authorised to act for a principal and affect the principal’s legal position. Memorise the core chain: authority → duties → disclosure → accounting → liability. For the exam, distinguish actual authority from apparent authority, express authority from implied authority, and an agent’s personal liability from the principal’s liability.

Law of Agency is tested under Paper 1, which contains 8 legal-foundation topics. The RES examination has two papers; each paper requires a passing mark of 60, subject to CEA review. Use this Law of Agency quick reference alongside the Law of Agency topic guide and Free RES Practice. The fastest revision method is to learn each rule, identify the parties, then apply the rule to the facts.

Bottom line: In an RES agency question, first identify the principal, agent, third party, authority granted, duty owed and loss suffered; that sequence usually reveals who can enforce the transaction and who bears liability.

An agent is a person authorised to act on behalf of a principal so as to create or affect legal relations with a third party. The principal is the person represented; the agent performs the authorised act; the third party deals with the agent. In property transactions, a seller or landlord may be the principal, while a salesperson acts through the estate agency representing that client.

Key terms to memorise:

• Agency: The legal relationship between principal and agent.
• Authority: The power given to the agent to act for the principal.
• Mandate: The instructions or scope given by the principal.
• Fiduciary duty: A duty of loyalty requiring the agent to act honestly, avoid conflicts and protect the principal’s interests.
• Undisclosed principal: A principal whose identity is not revealed to the third party at the time of contracting.
• Sub-agent: A person appointed by an agent, usually requiring the principal’s authority.

The Estate Agents Act (Cap. 95A) regulates estate agency work and provides the statutory framework administered by CEA. Always separate the agency relationship from the underlying sale, lease or other contract.

Actual authority comes from the principal; apparent authority comes from the principal’s representation to the third party. Express actual authority is given orally or in writing, while implied actual authority arises from the agent’s position, prior dealings or what is reasonably necessary to perform authorised duties.

Apparent, or ostensible, authority may bind the principal even when the agent exceeded internal instructions. The essential checklist is:

• The principal made a representation, by words or conduct, that the agent had authority.
• The representation reached the third party.
• The third party relied on it.
• The third party acted within the apparent scope of authority.

A secret limitation known only to the principal generally cannot defeat an innocent third party who reasonably relied on the principal’s representation. However, an agent cannot create apparent authority solely through the agent’s own unsupported statement.

Exam shortcut: Ask, “What did the principal authorise?” for actual authority, then ask, “What did the principal make the third party reasonably believe?” for apparent authority. These are different questions and can produce different answers.

An agent must act loyally, honestly, competently and within authority. The most testable duties are fiduciary in nature and continue until the agency ends or the duty is otherwise discharged.

Memorise this duty checklist:

• Follow the principal’s lawful instructions.
• Exercise reasonable care, skill and diligence.
• Act in the principal’s best interests.
• Avoid conflicts of interest unless properly disclosed and consented to.
• Do not make secret profits or accept undisclosed benefits.
• Keep the principal’s money and property separate and account for them.
• Keep confidential information confidential, subject to legal or professional disclosure requirements.
• Present material facts and relevant offers promptly.
• Do not place personal interests ahead of the principal’s interests.

An agent who receives a commission, referral benefit or other advantage connected with the agency should disclose it and obtain the required consent. A principal may seek damages, an account of profits, rescission or other remedies depending on the breach.

Definitive rule: Disclosure must be timely, complete and meaningful; hiding a conflict until after completion does not normally cure the breach.

An agent must not secretly represent competing interests or profit from the agency. In a property transaction, conflict risks arise when the same salesperson or estate agency represents both buyer and seller, acts for landlord and tenant, buys the property personally, or receives an undisclosed referral payment.

For quick revision, apply the D-C-C test:

• Disclose the conflict and relevant benefit.
• Obtain informed Consent from the affected principal or principals.
• Continue only if the arrangement remains legally and professionally permissible.

Consent should be given before the conflicted transaction proceeds and should be sufficiently informed. Disclosure of a vague “possible conflict” may be inadequate if the agent knows the specific interest, commission or relationship involved. An agent cannot use confidential information obtained for one client to benefit another client.

Possible consequences include loss of commission, repayment of secret profits, damages, termination of the agency and regulatory consequences under the Estate Agents Act framework. For an exam scenario, identify the undisclosed interest first, then determine whether disclosure and informed consent occurred before deciding liability or remedy.

A principal is generally bound by an authorised contract made by the agent, while an agent may be liable for exceeding authority, negligence or misrepresentation. If an agent contracts within actual or apparent authority, the third party may enforce the contract against the principal even if the agent breached private instructions.

Distinguish the main liability routes:

• Authorised contract: Principal and third party are normally bound.
• Unauthorised contract: Principal may ratify it, reject it, or become bound if apparent authority applies.
• Agent’s warranty of authority: An agent who falsely represents having authority may be personally liable to the third party.
• Tort or negligence: The agent may be liable for careless statements, failure to exercise reasonable skill or breach of a duty owed directly to another person.
• Fraud or misrepresentation: Personal liability may arise even where the agent was acting for a principal.

An agent is not automatically a contracting party merely because the agent negotiated or signed on behalf of the principal. Always ask whether the agent disclosed the principal, acted within authority and made an independent representation that caused loss.

Ratification allows a principal to adopt an unauthorised act retrospectively, but only when the legal requirements are satisfied. The principal must generally have existed and had capacity when the act occurred, the agent must have purported to act for that principal, and the principal must ratify the transaction as a whole rather than selectively accepting only favourable parts.

Agency may end through:

• Completion of the assigned task.
• Expiry of the agreed period.
• Mutual agreement.
• Revocation by the principal, subject to contractual consequences.
• Renunciation by the agent, subject to contractual consequences.
• Death, incapacity, bankruptcy or insolvency where legally relevant.
• Frustration or another event making performance impossible.

Delegation is not automatically allowed. Delegatus non potest delegare means a delegate generally cannot delegate further without authority, although delegation may be permitted by express instruction, trade custom, necessity or the nature of the work. An agent who appoints an unauthorised sub-agent may remain responsible for that person’s conduct.

Revision rule: Ratification concerns a past unauthorised act; termination concerns whether authority continues for future acts.

The RES exam contains two papers, and Paper 1 is the paper that covers Law of Agency. Each paper has Section A with 60 MCQs worth 60 marks and Section B with 20 case-study MCQs worth 40 marks; each paper lasts 2 hours 30 minutes.

Exam item	Current reference point
Paper 1	8 legal-foundation topics, including Law of Agency
Paper 2	5 practical-transaction topics
Passing mark	60 for each paper, subject to CEA review
2026 full sitting	S$512.30 for 2 papers
2026 modular sitting	S$283.40 for 1 paper
2026 listed sessions	14–15 Mar, 18–19 Jul, 31 Oct–1 Nov

For Law of Agency, prioritise authority, fiduciary duties, conflicts, disclosure, secret profits, ratification and liability. Use the RES Exam Guide for the wider syllabus and exam process. Do not memorise isolated definitions only; case-study questions test which rule applies to the facts and which party has the remedy.

What is the most important Law of Agency distinction? Actual authority is created by the principal’s authorisation; apparent authority is created by the principal’s representation to a third party. An agent’s private limitation does not necessarily defeat a third party who reasonably relied on apparent authority.

Can an agent keep a referral fee? Not secretly. A benefit connected with the agency should be disclosed and properly consented to; otherwise the agent may face repayment, loss of commission and other remedies.

Is an agent always personally liable for the contract? No. If the principal is disclosed and the agent acts within authority, the principal is normally the contracting party. Personal liability may arise for an unauthorised act, breach of warranty of authority, negligence, fraud or a separate promise.

Can the same agent represent both sides? Only where the arrangement is legally and professionally permissible and conflicts are fully disclosed with informed consent. Confidential information must still be protected.

What should be written beside every case question? Principal, agent, third party, authority, duty, breach, loss and remedy. That seven-word framework converts a long scenario into a structured agency-law answer.

Before the RES exam, revise agency as a decision sequence rather than a long chapter. Start with the relationship, identify the authority, test the agent’s duties, then determine the contract and remedy.

Last-minute checklist:

• Principal authorises agent: express or implied actual authority.
• Principal creates third-party impression: possible apparent authority.
• Agent acts outside authority: consider ratification and warranty of authority.
• Agent receives a benefit: test disclosure, consent and secret profit.
• Two clients have competing interests: test conflict and confidentiality.
• Agent handles money or documents: test accounting and segregation.
• Agent makes a statement: test authority, accuracy, negligence and misrepresentation.
• Agency ends: check whether later acts remain authorised.
• Property transaction: connect the agency issue to the Estate Agents Act (Cap. 95A), relevant CEA requirements and the underlying contract.

For broader Singapore property revision, remember that official sources such as the Estate Agents Act, Planning Act, Land Titles Act and HDB Resale Procedures may supply the governing rule in a case question. The Prepare app also offers practice questions across all 13 RES examination topics, making it useful for mixed-topic revision after completing this Law of Agency summary.