The amendment of a contract is not merely a mutual agreement between the parties but must also comply with legal regulations to ensure its validity and avoid potential disputes.
The amendment of a contract is not merely a mutual agreement between the parties but must also comply with legal regulations to ensure its validity and avoid potential disputes.
I. Current situation concerning the amendment of product distribution agreements
In today’s developing business market, the execution of product distribution agreements has become increasingly common, particularly in industries such as fast-moving consumer goods, pharmaceuticals, electronics, and food and beverages.

However, the implementation of these agreements is not always stable or seamless. In practice, the need of the amendment of product distribution agreements arises frequently, stemming from several causes:
- Market fluctuations: Changes in raw material prices, transportation costs, exchange rates, or tax policies may compel parties to adjust provisions relating to pricing, payment methods, or discounts.
- Changes in legal policies: Certain sectors (such as alcohol, tobacco, and pharmaceuticals) are subject to strict legal regulation. When new laws are stated, the contract must be amended accordingly.
- Adjustments in business strategy: Enterprises may wish to expand or narrow the scope of distribution, alter territories, quantities, or cooperation terms.
- Practical implementation issues: During the course of performance, disputes, obstacles, or force majeure may arise, necessitating contractual amendments to ensure feasibility.
In practice, many Vietnamese enterprises have not paid adequate attention to the amendment process. Some rely on oral agreements or execute informal appendices without adhering strictly to legal requirements, leading to risks of contract invalidation or disputes. Additionally, failure to promptly amend agreements when circumstances change may result in the continued application of outdated provisions, putting one party at a disadvantage.
II. Legal regulations on the amendment of product distribution agreements
Amending a product distribution agreement is not only a business necessity but also a matter governed by law to ensure legality, transparency, and the protection of legitimate interests of the parties.
1. What is an amendment of a product distribution agreement?
A product distribution agreement is a type of commercial contract whereby a supplier provides its products to a distributor, who sells such products within a defined territory as agreed. The distributor purchases the products from the supplier under specific terms and conditions of distribution.
An amendment of a product distribution agreement refers to an arrangement between the contracting parties to modify one or more of the original terms and conditions of the agreement (for example: subject matter, pricing, distribution scope, payment method, contract duration, or the parties’ rights and obligations).
Amendments may be made through a contract appendix or a separate amendment agreement, both of which must hold the same legal validity as the principal contract.
2. When should parties consider amending the product distribution agreement?
Parties should consider making amendments in the following circumstances:
- When changes in laws directly affect the contract (e.g., new regulations governing distributed goods).
- When significant market or cost fluctuations result in existing provisions without compliance with legal regulations.
- When a party is unable to perform its obligations due to force majeure or changes in business strategy.
- When it is necessary to expand or limit the distribution scope or adjust terms on payment, commissions, or discounts.
- When disputes or difficulties arise during performance, requiring amendment to ensure practicality and fairness.
3. What is the legal procedure for amending product distribution agreements?
According to Article 421 of the Civil Code 2015:
- Amendments must be based on mutual consent and conducted under principles of freedom, voluntariness, and equality.
- The amendment form must conform to the form of the original contract. If the principal contract was made in writing, the amendment must also be in writing (either as an appendix or an amendment agreement).
- The amended content shall have the same binding legal effect as the principal contract and must be duly signed by the parties.
- If the contract was notarized, certified, or registered (as required by law), the amendment must follow the same procedure.
III. Common questions concerning amendments of product distribution agreements
In practice, enterprises and individuals often raise questions regarding procedures, validity, and potential risks when amending contracts. Common concerns include:
1. Is notarization or certification required for an amendment?
Under Clause 3, Article 421 of the Civil Code 2015, the amendment must comply with the form of the original contract.

Accordingly, notarization or certification is only required if the original contract was subject to such formality (for example, contracts concerning real estate). For standard product distribution contracts, notarization is not mandatory; however, parties may choose to notarize the amendment to enhance legal validity and minimize disputes.
2. What legal risks may arise from non-compliant amendments?
Common risks include:
- Verbal amendments, making it difficult to prove in the event of a dispute.
- Amended terms contrary to law or public morals, rendering the contract partly or wholly invalid.
- Failure to comply with required formality (e.g., original written contract but amendment made via email or text message).
- Amendments lacking the full consent of all parties in multi-party contracts.
3. Is it mandatory to execute the amendment in writing?
Pursuant to Clause 3, Article 421 of the Civil Code 2015, the amendment must follow the form of the original contract.
Therefore, if the principal contract was executed in writing, any amendment must likewise be made in writing (through an appendix or amendment agreement) and signed by authorized representatives of all parties for legal validity.
4. Can the contract be amended multiple times during its term?
The law imposes no restriction on the number of amendments. Provided that each amendment is mutually agreed upon, properly executed, and does not contravene any prohibitive provisions, the parties may amend the contract as many times as necessary to reflect changing business realities.
5. Do amendments alter the fundamental rights and obligations of the parties?
Amendments may indeed modify the parties’ fundamental rights and obligations, especially where they concern core terms such as subject matter, price, duration, or scope of distribution.

However, minor or technical modifications are unlikely to materially affect basic obligations. Hence, careful review and negotiation are essential to maintain balance and fairness.
IV. Legal consulting services on amendments of product distribution agreements
To mitigate legal risks, many enterprises seek assistance from lawyers or law firms. Such consulting services typically include:
- Reviewing the existing contract and identifying clauses requiring amendment in compliance with law;
- Advising negotiation strategies to maintain fair interest between the parties;
- Drafting appendices or amendment agreements to ensure legality and precision;
- Supporting notarization, certification, or registration procedures where applicable;
- Representing clients in disputes arising from contract amendments.
Through these services, enterprises can ensure that amended contracts remain lawful, practical, and aligned with business operations while minimizing potential conflicts.
For any inquiries regarding amendments to product distribution agreements or other legal matters, please contact NPLaw for direct consultation and guidance.