Start Here: 5 Things You MUST Know
There are 3 ways to create an agency: Appointment, Estoppel, and Ratification
Appointment is the most common method — the principal directly authorizes the agent
Estoppel creates an agency from the principal's conduct, not their intent — a third party just has to reasonably believe it exists
Ratification requires 4 conditions and must cover the entire transaction — no cherry-picking
An agency contract must be in writing if it lasts beyond one year (Statute of Frauds)
1. What is Agency?
Agency
A relationship in which one party (the agent) is authorized to act on behalf of another party (the principal). In plain English: "I'm giving you permission to make deals for me."
Principal
The person who gives authority to another to act on their behalf. Think of them as "the boss."
Agent
The person authorized to act for the principal. They represent the principal in dealings with others.
Power of Attorney
A written document that formally grants an agent authority to act for the principal. Spells out exactly what the agent can do.
Statute of Frauds
Requires agency contracts lasting beyond one year to be in writing to be enforceable.
Real-World Scenario: Insurance Agency
The Setup: State Farm (principal) authorizes Lisa (agent) to sell auto insurance policies on its behalf.
What Happens: Lisa meets with a customer and writes a policy. The customer pays the premium to Lisa.
The Result: The contract is between the customer and State Farm — not the customer and Lisa. Lisa acted as State Farm's agent, so State Farm is bound by the policy Lisa wrote within her authority.
2. Agency by Appointment (The Normal Way)
Express Appointment
The principal directly tells the agent: "You are authorized to act for me." This is the most common and straightforward way to create an agency. The principal explicitly states what the agent can and cannot do.
Key Rule: Statute of Frauds
If the agency is meant to last beyond one year, the agency contract must be in writing to be enforceable. Oral agreements for agencies under one year are still valid.
Real-World Scenario: Express Appointment
The Setup: Sarah owns a real estate company. She hires Jake and says, "You are authorized to list and sell properties on behalf of my company."
What Happens: Jake is now Sarah's agent by express appointment. He begins listing and selling properties.
The Result: Any contracts Jake enters within his authorized scope are binding on Sarah. If Jake sells a house for $300,000, Sarah is bound by that deal because she expressly authorized Jake to make sales.
3. Agency by Estoppel
Estoppel = "You Can't Deny It Now"
Even though the principal never officially appointed someone as their agent, the principal's words or behavior made a third party reasonably believe an agency existed. The principal is then "estopped" (legally blocked) from denying the agency.
Critical Concept
The principal does NOT have to deliberately create the agency. Their conduct just needs to give a third party a reasonable basis to believe the agency exists. Intent does not matter — conduct does.
Real-World Scenario: Car Dealership Estoppel
The Setup: Bob owns a car dealership. He lets his friend Mike sit at a sales desk, wear a company polo, and talk to customers — even though Mike is not actually an employee.
What Happens: A customer walks in, sees Mike at the desk in company gear, and reasonably believes Mike works there. Mike sells the customer a car.
The Result: Bob is "estopped" from denying Mike was his agent. The sale is binding on Bob because Bob's own conduct created the reasonable appearance of an agency. Bob cannot later say "Mike wasn't my agent."
Insurance Example: Estoppel
The Setup: An insurance company lets a former agent continue using company letterhead, business cards, and office space after their contract expired.
What Happens: The former agent sells a policy to a new customer using the company materials.
The Result: The insurer is estopped from denying the agency. By allowing the former agent to keep using company materials, the insurer created a reasonable appearance of continued authority. The customer's policy is binding.
4. Agency by Ratification
Ratification = After-the-Fact Approval
Someone acts as your agent without your authorization, and after the fact you say "OK, I approve what they did." By approving (ratifying) the unauthorized act, you retroactively create an agency.
The 4 Conditions for Ratification
Agent Purported to Act for Principal
The person must have claimed to be acting on behalf of the principal (not for themselves).
Entire Transaction Ratified
The principal must ratify the entire deal — it is all or nothing. No cherry-picking the good parts.
Before Third Party Withdraws
The principal must ratify before the third party backs out. If the third party withdraws first, it is too late.
Principal Has All Material Facts
The principal must have all material facts available before ratification is binding. You cannot approve what you do not understand.
Real-World Scenario: Unauthorized Widget Order
The Setup: Carlos tells a supplier, "I'm ordering 500 widgets on behalf of Acme Corp," even though Acme never authorized Carlos to do this.
What Happens: Acme's CEO finds out about the order and says, "Actually, we do need those widgets. I approve the order."
The Result: By ratifying the order, Acme retroactively creates an agency. The contract is now binding on Acme as if Carlos had been authorized all along. All 4 conditions are met: Carlos claimed to act for Acme, the CEO approved the whole deal, the supplier had not withdrawn, and the CEO understood the terms.
Comparing the 3 Methods
| Method | When It Happens | Key Feature | Principal's Intent? |
|---|---|---|---|
| Appointment | Before the agent acts | Principal directly authorizes | Yes — intentional |
| Estoppel | When third party relies | Principal's conduct creates appearance | No — not required |
| Ratification | After the agent already acted | Principal approves retroactively | Yes — after the fact |
Cheat Sheet
Print this page for quick referenceAgency Creation Methods
- Appointment: Principal directly authorizes agent (most common)
- Estoppel: Principal's conduct creates reasonable belief in third party
- Ratification: Principal approves unauthorized act after the fact
Ratification Requirements (All 4 Needed)
- 1. Agent purported to act for principal
- 2. Entire transaction ratified (all or nothing)
- 3. Ratified before third party withdraws
- 4. Principal has all material facts
Key Rules
- Written contract required if agency lasts beyond 1 year
- Power of attorney = formal written grant of authority
- Estoppel does NOT require principal's intent
Key Definitions
- Principal: The boss who authorizes
- Agent: The one who acts on behalf
- Estoppel: Legally blocked from denying
Exam Trap Alerts
1. Estoppel Does NOT Require Intent
The exam may say "the principal never intended to create an agency." That does not matter for estoppel. Estoppel arises from the principal's conduct, not their intent. If a third party reasonably believed the agency existed because of the principal's behavior, the principal is estopped.
2. Ratification Must Be ALL or NOTHING
A principal cannot ratify the profitable parts of a deal and reject the unprofitable parts. If the exam describes a principal saying "I'll take the good deal but reject the bad one" — that is NOT valid ratification.
3. Timing Matters for Ratification
If the third party withdraws from the deal before the principal ratifies, it is too late. Ratification must happen while the third party is still committed to the deal.
4. Oral Agencies Under One Year Are Valid
The Statute of Frauds only requires a written agency agreement if it is meant to last beyond one year. An oral appointment for a 6-month project is perfectly valid.
Quick Reference Summary
Agency
One person authorized to act on behalf of another.
Appointment
Most common method. Principal directly authorizes agent.
Estoppel
Principal's conduct creates reasonable belief. Intent not required.
Ratification
After-the-fact approval. 4 conditions. All or nothing.
Power of Attorney
Formal written document granting authority.
Statute of Frauds
Written contract needed if agency lasts beyond 1 year.