​Malaysian Banking Law – The Contractual Relationship Between Banker and Customer
Case ScenarioAhmad opened a savings and current account with Malayan Banking Berhad. Over several years:

• He deposited money into his account,
• Issued cheques,
• Used online banking services,
• Applied for remittance and fund transfer services.

One day:

• The bank suddenly froze his account without notice,
• Refused to honour his cheque,
• Delayed repayment of money standing in his account.

Ahmad argued that:

• The bank breached its obligations,
• The banker-customer relationship created contractual duties,
• The bank failed to act according to the terms of the banking contract.

The bank argued that:

• Banking operations are governed by standard banking terms,
• The customer also owes duties to the bank,
• The bank may restrict operations in certain situations.

The court therefore had to determine:
What is the legal nature of the banker-customer relationship and what duties arise from it?

IntroductionThe relationship between a banker and customer is one of the most important legal relationships in banking law.
In Malaysian banking law:

• Banking services are contractual in nature,
• Rights and obligations arise from agreements between the bank and customer,
• Both parties owe legal duties to each other.

The banker-customer relationship governs:

• Deposits,
• Withdrawals,
• Remittances,
• Cheques,
• Standing orders,
• Fund transfers,
• Loans,
• Foreign currency transactions,
• Islamic banking facilities.

Definition of a BankerA banker generally refers to:

• A person,
• Corporation,
• Financial institution,

carrying on the business of banking.
Traditionally, a banker performs functions such as:

1. Accepting deposits,
2. Maintaining current accounts,
3. Paying cheques,
4. Collecting cheques,
5. Providing financing facilities.

UK Definition of BankerIn the United Kingdom, there is no single exhaustive statutory definition of “bank” or “banker”.
The definition developed through cases and legal writings.

United Dominions Trust Ltd v KirkwoodThe leading authority is:

• United Dominions Trust Ltd v Kirkwood.

The Court identified the essential characteristics of banking:

1. Conducting current accounts,
2. Paying cheques,
3. Collecting cheques.

Lord Denning’s ViewLord Denning stated:
“A banker is easier to recognise than to define.”
He explained that courts may also consider:

• Commercial reputation,
• Stability,
• Soundness,
• Public recognition.

Paget’s Law of BankingAccording to:

• Paget's Law of Banking,

no person can be regarded as a banker unless they:

1. Take current accounts,
2. Pay cheques,
3. Collect cheques.

Malaysian Definition of BankerUnder the Financial Services Act 2013:

• A “bank” means a person carrying on banking business,
• Banking business includes:
  • Accepting deposits,
  • Paying and collecting cheques,
  • Providing finance,
  • Other prescribed financial activities.

Malaysia adopts:

• A statutory licensing system,
• Regulation by Bank Negara Malaysia.

Definition of CustomerA customer is generally:
A person who maintains an account or conducts banking transactions with a bank.
A customer may:

• Deposit money,
• Withdraw money,
• Obtain financing,
• Use remittance services,
• Operate current or savings accounts.

The relationship usually begins:

• When an account is opened,
• When the bank accepts the customer.

Nature of the Banker-Customer RelationshipThe banker-customer relationship is fundamentally:
Contractual in nature.
This means:

• Banking transactions are based on contract law,
• Both parties have enforceable legal rights and obligations.

The relationship is governed by:

• General contract law,
• Special banking contracts,
• Banking terms and conditions,
• Express and implied contractual terms.

Simple Explanation of the Contractual Relationship
​When a customer opens an account:

• The customer agrees to place money with the bank,
• The bank agrees to receive and manage the money.

The bank does not hold the money as a trustee.
Instead:
The bank becomes a debtor and the customer becomes a creditor.
This means:

• The money legally belongs to the bank,
• The bank promises to repay the customer according to the banking contract.

The relationship also covers:

• Fund transfers,
• Remittances,
• Standing orders,
• Banker’s drafts,
• Foreign currency transactions,
• Loans,
• Islamic banking transactions.

Joachimson v Swiss Bank Corporation
The classic explanation of the banker-customer relationship comes from:

• Joachimson v Swiss Bank Corporation.

Lord Atkin explained that:
The bank:

• Receives money,
• Collects bills,
• Uses the money,
• Promises to repay the customer upon demand.

The bank also promises:

• To honour written payment instructions,
• To operate the account during banking hours,
• To give reasonable notice before terminating the relationship.

The customer also owes duties:

• To exercise reasonable care when issuing cheques,
• To avoid facilitating fraud or forgery.

Key Principles From Joachimson
1. Bank Is Debtor, Customer Is CreditorOnce money is deposited:

• Ownership passes to the bank,
• The bank owes repayment obligations to the customer.

2. Repayment Must Be Demanded
The bank generally becomes liable to repay:

• Only after the customer demands payment,
• Usually at the branch where the account is maintained.

3. Bank Must Honour Customer Instructions
The bank must:

• Honour valid cheques,
• Follow payment instructions,
• Execute banking transactions properly.

4. Customer Owes Duties Too
The customer must:

• Exercise reasonable care,
• Avoid negligence,
• Prevent forgery risks.

5. Reasonable Notice Is Required
A bank generally cannot suddenly terminate the relationship without:

• Reasonable notice,
  unless justified by law or contract.

Express and Implied Terms
The banker-customer contract may contain:
Express TermsThese are clearly stated terms such as:

• Account terms,
• Financing agreements,
• Online banking terms,
• Banking policies.

Implied Terms
These are obligations implied by law or banking practice, such as:

• Duty of confidentiality,
• Duty to honour valid cheques,
• Duty to exercise reasonable care and skill.

Single Overall Banking Relationship
Even though separate banking transactions may exist:

• Loans,
• Securities transactions,
• Foreign exchange dealings,

there is usually:
One overall contractual relationship between banker and customer.

Practical Application
Suppose a customer:

• Deposits RM50,000 into a bank account,
• Issues a cheque to a supplier,
• Requests an international remittance.

The bank:

• Must process the cheque properly,
• Must execute the remittance with reasonable care,
• Must follow valid customer instructions.

If the bank negligently refuses payment:

• The customer may sue for breach of contract.

Critical Analysis
The contractual model provides:

• Commercial certainty,
• Legal predictability,
• Clear allocation of rights and duties.

However, modern banking creates challenges because:

• Banking is increasingly digital,
• Automated systems reduce direct customer interaction,
• Online banking increases cyber risks.

Traditional contractual principles developed during:

• Physical branch banking,
• Paper cheque systems.

Today:

• Digital banking,
• Mobile banking,
• FinTech services,
• AI-driven banking systems,

may require modern reinterpretation of contractual duties.

Further Analysis
The banker-customer relationship is unique because:

• It combines contract law,
• Financial regulation,
• Fiduciary-like duties,
• Commercial practice.

Although the relationship is contractual:

• Banks also owe regulatory obligations,
• Public confidence in banking affects economic stability.

Thus:

• Modern banking law balances private contractual rights with public financial regulation.

Unresolved Issues
Digital Banking RelationshipsHow should contractual duties apply in fully digital banking systems?

Cyber Fraud Risks
To what extent should banks be liable for online fraud and hacking?

AI and Automated Banking
Can automated systems fulfil traditional banking duties of reasonable care and skill?

Cryptocurrency and Digital Assets
Do banker-customer principles apply to crypto exchanges and digital wallets?

Solutions to the Case Scenario
Solution 1The bank must honour valid customer instructions unless lawful reasons justify refusal.

Solution 2
The bank should provide reasonable notice before terminating banking facilities.

Solution 3
Customers must exercise reasonable care when issuing payment instructions.

Solution 4
Banks should maintain proper security systems and exercise reasonable care in digital transactions.

Conclusion
The banker-customer relationship is fundamentally contractual in nature. The relationship creates reciprocal legal rights and obligations between the bank and customer. The classic principles established in Joachimson v Swiss Bank Corporation remain central to modern banking law. A bank undertakes to receive deposits, honour payment instructions, and repay money upon demand, while the customer must exercise reasonable care in operating the account. The definition of banker developed through authorities such as United Dominions Trust Ltd v Kirkwood, Lord Denning, and Paget's Law of Banking continues to influence Malaysian banking law under the Financial Services Act 2013. Modern banking developments now require these traditional principles to be adapted to digital and electronic banking environments.

References

1. Joachimson v Swiss Bank Corporation
2. United Dominions Trust Ltd v Kirkwood
3. Paget's Law of Banking
4. Halsbury's Laws of England
5. Financial Services Act 2013
6. Bank Negara Malaysia