By Lawyer Le Phuong Thanh – UniLaw LLC

Lawyer Contract Disputes – Unilaw

Contract disputes represent one of the most challenging aspects of commercial law practice in Vietnam, often requiring sophisticated legal intervention to protect clients’ interests and ensure favorable outcomes. At Unilaw, we have extensive experience handling complex contract disputes across various industries, from construction agreements to commercial trading contracts. Our expertise in navigating Vietnam’s evolving legal framework enables us to deliver effective solutions for both domestic and international clients facing contractual conflicts.

A recent case handled by our firm illustrates the complexity and stakes involved in construction contract disputes. A Vietnamese tax authority engaged in a protracted legal battle with a construction company over a building project that experienced significant delays and performance failures. The dispute, which ultimately reached the Supreme People’s Court appellate division in Ho Chi Minh City, involved claims exceeding 16 billion VND and centered on issues of contract termination, advance payment recovery, penalty enforcement, and price escalation costs. This case exemplifies the multifaceted nature of lawyer contract disputes and underscores the importance of experienced legal representation.

Understanding Lawyer Contract Disputes in Vietnam

Contract disputes arise when one or more parties involved in a contract disagree about its terms, interpretation, or fulfillment. These disputes can occur in business contracts, employment agreements, real estate deals, construction projects, and virtually any commercial arrangement. Under Vietnam’s Commercial Law (Law No. 36/2005/QH11, as amended), contractual relationships are governed by principles of freedom of contract, good faith, and legal compliance.

According to Article 11 of the Commercial Law, parties have the right to freely negotiate terms that do not violate legal provisions, fine customs, or social morality. However, when disagreements emerge regarding contract performance, interpretation, or breach, professional legal intervention becomes essential to protect rights and enforce obligations.

Common Causes of Contract Disputes

Unclear or Ambiguous Contract Language

One of the most frequent sources of contractual conflict is vague or poorly defined terms within the agreement itself. When contractual obligations are not clearly articulated, parties may develop divergent understandings of their respective duties. The Vietnamese Commercial Law emphasizes the importance of clarity in commercial transactions, and Article 12 provides that established customs between parties may be applied to interpret ambiguous terms. However, reliance on customs or trade practices cannot substitute for well-drafted contractual provisions.

In construction contracts particularly, ambiguity regarding scope of work, quality standards, completion timelines, and payment terms frequently leads to disputes. The case involving the tax authority and construction company demonstrated how unclear performance standards and inadequate project management provisions can escalate into major litigation involving contract termination and substantial financial claims.

Failure to Perform Contractual Obligations

Article 3(12) of the Commercial Law defines breach of contract as “the failure of one party to perform, incomplete performance, or improper performance of obligations according to the agreement between the parties or as prescribed by this Law.” Performance failures represent the core of most contract disputes and can take various forms including missed deadlines, substandard work quality, incomplete deliverables, or complete abandonment of contractual duties.

The construction dispute handled by Unilaw involved repeated work stoppages and delayed performance by the contractor. According to the case record, the construction company “stopped construction many times without clear reasons or performed work intermittently, leading to violations of project implementation schedules.” Such performance failures not only delayed project completion but also triggered contractual penalties and ultimately justified contract termination by the client.

Article 3(13) of the Commercial Law introduces the concept of “fundamental breach,” defined as a contract violation causing such substantial harm that the injured party cannot achieve the contract’s purpose. In the construction case, the contractor’s repeated delays and failure to complete work within the extended deadline constituted fundamental breach, entitling the tax authority to terminate the agreement and seek comprehensive damages.

Disputes Over Payment and Financial Terms

Financial disagreements frequently trigger contract disputes, particularly concerning advance payments, progress payments, price adjustments, and final settlement amounts. In the construction case, the dispute involved recovery of advance payments totaling over 7.5 billion VND that had been provided to the contractor but not properly utilized or accounted for through completed work.

The case also highlighted disputes over offsetting mechanisms. The contractor argued that certain amounts should be deducted from the advance payment obligation, including a 1.5 billion VND performance guarantee and approximately 1.09 billion VND for incomplete work actually performed on site. These offsetting claims required careful legal analysis and negotiation to resolve.

Price Escalation and Additional Cost Claims

Long-term contracts, particularly in construction and supply agreements, often face challenges related to price changes over time. The tax authority’s claim included over 4.6 billion VND in “price slippage” costs—the additional expense required to complete the project with a replacement contractor due to market price increases during the delay period.

Such claims raise complex questions about risk allocation, force majeure, hardship provisions, and contractual price adjustment mechanisms. Vietnamese law recognizes that parties may agree to price adjustment terms, but absent clear contractual provisions, disputes over who bears the risk of price increases can become contentious.

Legal Framework Governing Contract Disputes in Vietnam

Vietnam’s legal system provides multiple layers of regulation for commercial contracts. The Commercial Law serves as the primary framework for business-to-business transactions, while the Civil Code applies to matters not specifically addressed in commercial legislation. Article 4 of the Commercial Law establishes this hierarchical relationship, stating that specific commercial activities governed by other laws follow those specialized provisions, while matters not covered by any specific law default to Civil Code provisions.

For international contracts, Article 5 of the Commercial Law permits parties to agree on the application of foreign law or international commercial practices, provided such application does not contradict fundamental principles of Vietnamese law. This flexibility enables Vietnamese businesses engaged in cross-border transactions to adopt internationally recognized contractual frameworks while maintaining compliance with domestic public policy requirements.

The Resolution Process: From Negotiation to Litigation

The construction dispute case demonstrates the typical progression of contract dispute resolution in Vietnam. Initially, the parties attempted to resolve their differences through direct negotiation and correspondence. When these efforts failed, the tax authority filed a lawsuit in the provincial People’s Court, which issued a first-instance judgment fully accepting the plaintiff’s claims.

The construction company then exercised its appellate rights, bringing the case before the Appellate Court of the Supreme People’s Court in Ho Chi Minh City. Significantly, during the appellate proceedings, the parties reached a negotiated settlement that modified the original judgment terms. The tax authority agreed to offset the performance guarantee and incomplete work value against the advance payment claim, waive interest charges of nearly 2 billion VND, and waive price escalation claims exceeding 4.6 billion VND. In exchange, the contractor accepted liability for the reduced advance payment balance and contractual penalties.

This settlement, reached under judicial supervision and incorporated into the appellate court’s decision, reduced the contractor’s total liability from over 16.6 billion VND to approximately 7.4 billion VND—a reduction of more than 55%. This outcome illustrates the value of experienced legal representation in negotiating favorable dispute resolutions even after adverse trial court decisions.

Loan Disputes and Evidentiary Challenges: The Critical Role of Documentation

While construction disputes often involve complex technical and commercial issues, loan contract disputes present a different set of challenges centered on proof of agreement and authentication of documentation. A recent appellate case from the Supreme People’s Court illustrates how critical proper documentation and forensic evidence can be when parties contest the validity of loan agreements.

In Case No. 15/2025/DS-PT decided on July 28, 2025, the plaintiff Ms. Đặng Thị Hà T claimed that on February 2, 2001, she had lent VND 173,950,000 to the married couple Ms. Nguyễn Thị Mỹ P and Mr. Huỳnh Hữu L. According to the plaintiff, the borrowers agreed to repay VND 100,000 daily until February 2, 2006, and both signed a handwritten loan acknowledgment. However, the defendants denied ever borrowing the money, with Mr. L specifically claiming the signature on the loan document was not his.

The provincial court initially rejected the plaintiff’s claim entirely, finding insufficient evidence to establish that the loan transaction had occurred. This outcome demonstrates the fundamental evidentiary burden plaintiffs face in contract disputes—particularly for informal loan agreements common in Vietnamese commercial practice that may lack the formal documentation standards of institutional lending.

The Appellate Reversal: When Forensic Evidence Changes Everything

The case took a dramatic turn at the appellate level when the plaintiff obtained forensic handwriting analysis. The Forensic Science Institute in Ho Chi Minh City conducted a comprehensive examination comparing the signatures and handwriting on the disputed loan document with sample writings from both defendants collected from their divorce proceedings.

The forensic conclusion was definitive: both the signature and handwritten name “Huỳnh Hữu L” on the loan document were written by the same person who produced the comparison samples from the divorce case. Similarly, the signature and handwritten name “Nguyễn Thị Mỹ P” matched her authenticated writing samples. This scientific evidence directly contradicted Mr. L’s testimony that he had never signed any loan document for Ms. T.

Based on this new forensic evidence presented at the appellate stage, the Supreme People’s Court completely reversed the lower court decision. The appellate court accepted the plaintiff’s claim in full, ordering both defendants to jointly repay the entire loan amount of VND 173,950,000 plus statutory interest from the date of judgment enforcement until full payment.

Legal Standards for Contract Proof Versus Actual Judicial Practice

This case reveals a significant gap between the theoretical legal framework and practical evidentiary requirements in Vietnamese courts. Article 467 of the 1995 Civil Code (applicable to this 2001 transaction) establishes that loan agreements may be formed through various means, including oral agreements and informal written acknowledgments. The law does not mandate notarization or particular formalities for most civil loans to be valid.

However, the initial trial court’s rejection of the claim demonstrates that when a defendant contests a loan agreement’s authenticity, courts require more than the plaintiff’s testimony and a disputed document. The practical burden of proof extends beyond establishing that a loan agreement theoretically could be valid to affirmatively proving that the specific agreement was actually executed by the parties.

The appellate court’s reliance on forensic handwriting analysis reflects the judiciary’s approach when faced with directly contradictory testimony. Rather than simply weighing witness credibility, Vietnamese courts increasingly turn to scientific evidence to resolve factual disputes. This practice aligns with Article 91 of the Civil Procedure Code, which permits courts to order expert examination of evidence when necessary to clarify case facts.

Significantly, the appellate court accepted the forensic evidence despite certain documentary deficiencies that the defendants raised. The loan acknowledgment did not specify the lender’s full identifying information or address with complete precision. Nevertheless, once the forensic analysis confirmed the defendants’ signatures were genuine, the court found these technical deficiencies insufficient to invalidate an otherwise authentic agreement.

When to Engage an Attorney for Contract Disputes

Both the construction dispute and loan dispute cases demonstrate the substantial value of experienced legal representation in contract litigation. In the construction case, the contractor faced an initial adverse judgment exceeding VND 16.6 billion but ultimately negotiated a settlement reducing liability by more than 55% through appellate proceedings. In the loan case, the plaintiff overcame complete initial defeat by obtaining forensic evidence that proved decisive on appeal.

An attorney for contract disputes provides critical advantages at multiple stages. During contract formation, legal counsel can draft clear provisions addressing foreseeable disputes—such as price adjustment mechanisms for construction contracts or detailed repayment schedules and authentication procedures for loan agreements. When disputes arise, experienced lawyers can evaluate whether negotiation, mediation, or litigation offers the best path forward based on the specific facts and applicable legal framework.

Perhaps most importantly, skilled legal representation becomes essential when cases reach the litigation stage. The loan dispute illustrates how sophisticated evidence gathering—such as obtaining comparison handwriting samples from unrelated proceedings and engaging qualified forensic experts—can determine case outcomes. Few individual litigants possess the procedural knowledge or resources to develop such evidence independently.

For businesses engaged in regular commercial transactions, establishing a relationship with qualified legal counsel before disputes arise enables proactive risk management. An attorney for contract disputes can review standard contract templates, advise on documentation practices that will withstand judicial scrutiny, and provide guidance on when contractual relationships should be formalized through notarization or other authentication measures that reduce future evidentiary challenges.

Frequently Asked Questions About Contract Dispute Lawyers

What does a lawyer for contract disputes do?

A lawyer for contract disputes provides comprehensive legal representation throughout the lifecycle of contractual relationships and conflicts. During contract formation, these attorneys draft clear provisions that minimize future disputes—such as detailed payment schedules, price adjustment mechanisms for construction projects, and authentication procedures for loan agreements. When disputes arise, they evaluate whether negotiation, mediation, or litigation offers the optimal resolution path based on the specific facts and applicable legal framework. In litigation, contract dispute lawyers gather sophisticated evidence, engage forensic experts when necessary, and navigate complex procedural requirements. As demonstrated in the loan dispute case discussed earlier, skilled attorneys can obtain comparison handwriting samples from unrelated proceedings and coordinate forensic analysis that proves decisive in appellate courts, capabilities that individual litigants rarely possess independently.

Is a contract attorney the same as a contract lawyer?

Yes, the terms “contract attorney” and “contract lawyer” are functionally synonymous and refer to legal professionals specializing in contractual matters and disputes. Both terms describe attorneys who handle contract drafting, review, negotiation, and dispute resolution. Some practitioners may prefer one term over the other based on regional usage or marketing preferences, but there is no substantive difference in the services provided. Whether you search for a contract attorney or contract lawyer, you should expect the same core competencies: expertise in contract law, experience with dispute resolution mechanisms, and the ability to represent clients in negotiations or litigation involving contractual disagreements.

When should I contact a contract law lawyer?

You should contact a contract law lawyer at several critical junctures. Ideally, engage legal counsel before signing significant commercial agreements—particularly construction contracts, loan agreements, or other high-value transactions. Proactive legal review can identify ambiguous terms, insert dispute resolution provisions, and establish documentation practices that withstand judicial scrutiny. If you are already involved in a contractual dispute, immediate consultation becomes essential when the other party threatens litigation, when informal negotiations reach an impasse, or when you receive formal legal notices. The construction dispute case illustrates this principle: although the contractor faced an initial adverse judgment exceeding VND 16.6 billion, experienced appellate representation ultimately negotiated a settlement reducing liability by more than 55%. Early engagement with qualified counsel maximizes your options and often prevents disputes from escalating to costly litigation.

What is the difference between a legal contract lawyer and a general practice attorney?

A legal contract lawyer possesses specialized expertise in contract formation, interpretation, and dispute resolution that general practice attorneys may lack. While general practitioners handle diverse legal matters across multiple practice areas, contract law specialists develop deep knowledge of specific contractual frameworks—such as construction law provisions governing price adjustments and completion obligations, or commercial lending requirements for loan documentation and authentication. This specialization proves particularly valuable in complex disputes requiring sophisticated evidence gathering. The loan dispute case demonstrates this advantage: the attorney obtained forensic handwriting analysis and navigated evidentiary rules regarding document authentication that determined the appellate outcome. For high-stakes commercial disputes, specialized contract lawyers typically provide more effective representation than general practitioners because they understand industry-specific contractual norms and possess established relationships with expert witnesses such as forensic document examiners or construction cost analysts.

How can Unilaw help with contract disputes?

Unilaw provides comprehensive legal representation for contract disputes across various commercial contexts, including construction agreements, loan contracts, and other business transactions. Our attorneys combine deep expertise in Vietnamese contract law with practical experience managing complex litigation and appeals. We assist clients at every stage: drafting clear contractual provisions that minimize future disputes, conducting thorough contract reviews before execution, negotiating favorable settlements when disputes arise, and providing aggressive representation in court when litigation becomes necessary. Our track record includes successfully representing clients in appellate proceedings that reversed unfavorable trial court decisions and negotiating substantial reductions in liability through strategic settlement discussions. For businesses engaged in regular commercial transactions, we offer proactive risk management through ongoing legal counsel, standard contract template development, and guidance on documentation practices that will withstand judicial scrutiny in the event disputes arise.

Contact Unilaw for Expert Contract Dispute Representation

Contract disputes can threaten your business operations and financial stability, but experienced legal representation significantly improves outcomes. Whether you need assistance drafting enforceable contracts, resolving existing disputes through negotiation, or pursuing litigation to protect your rights, Unilaw’s specialized contract law team provides the strategic guidance and aggressive advocacy you need.

Our attorneys understand that every contract dispute presents unique challenges requiring tailored solutions. We invest time understanding your business objectives, analyzing the specific contractual provisions at issue, and developing evidence-based strategies that maximize your position. From initial consultation through final resolution—whether by settlement or court judgment—we remain committed to protecting your interests and achieving practical, cost-effective results.

Contact Unilaw today to schedule a consultation with our contract dispute lawyers. Let us evaluate your situation, explain your legal options, and develop a strategic plan to resolve your contractual conflict efficiently and favorably.