Legal Due Diligence in Business Acquisitions: Essential Legal Checks Before Purchasing a Company in Bulgaria

Introduction

Acquiring an existing business is rarely a straightforward commercial transaction. Whether the deal involves the purchase of shares in a company or the transfer of an entire commercial enterprise, the buyer assumes far more than ownership of assets. Existing contractual relationships, regulatory obligations, employment matters, tax exposures, and potential litigation may all become part of the acquisition.

For this reason, legal due diligence represents one of the most important stages of any merger and acquisition (M&A) transaction. A properly conducted legal review enables investors to identify legal risks before signing the transaction documents, assess the true value of the target business, and negotiate contractual protections that reduce future liability.

This is particularly relevant under Bulgarian law. Companies may carry historical tax obligations, unresolved employment issues, defective corporate governance, or contractual restrictions that are not immediately apparent from financial statements alone. Without a comprehensive legal review, an apparently profitable acquisition may expose the purchaser to substantial financial and legal risks after completion.

Rather than treating due diligence as a procedural formality, sophisticated investors regard it as an essential risk management exercise that provides a complete picture of the legal status of the target company.

Understanding the Legal Nature of a Commercial Enterprise

Before examining the due diligence process itself, it is important to understand what is actually being acquired.

Under Article 15(1) of the Bulgarian Commercial Act, a commercial enterprise is defined as a combination of rights, obligations, and factual relationships. Consequently, the subject of the transaction extends well beyond tangible assets such as equipment, vehicles, or real estate.

A commercial enterprise may also include:

• contractual rights;

• receivables;

• intellectual property;

• trademarks;

• licences;

• goodwill;

• business reputation;

• customer relationships;

• supplier networks;

• know-how and confidential information.

Because all of these elements may have independent legal consequences, each should be carefully examined before the transaction is completed.

Where a commercial enterprise is transferred pursuant to Article 15 of the Commercial Act, Bulgarian law requires the agreement to be executed in writing with notarised signatures.

More importantly, the legal consequences extend beyond the transfer of assets.

Unless otherwise agreed with creditors, the purchaser succeeds not only to the seller's rights but also to its obligations. Furthermore, Article 15(3) of the Commercial Act establishes joint and several liability between the transferor and the transferee for the obligations of the enterprise up to the value of the transferred rights.

This statutory protection benefits creditors but significantly increases the importance of identifying existing liabilities before closing.

Choosing the Appropriate Acquisition Structure

Business acquisitions in Bulgaria are generally structured in one of two ways:

• acquisition of shares or ownership interests (Share Deal); or

• acquisition of the commercial enterprise or selected business assets (Asset Deal).

Although both structures ultimately transfer control over the business, their legal consequences differ considerably.

Share Deal

In a share acquisition, the legal entity itself remains unchanged. Only the ownership of the company changes.

As a result, all historical obligations remain with the company, including:

• contractual liabilities;

• employment obligations;

• pending litigation;

• administrative proceedings;

• tax exposures;

• regulatory compliance issues.

The purchaser effectively acquires the company's entire legal history, whether known or unknown at the time of the transaction.

Asset Deal

An Asset Deal focuses on the transfer of the business or selected assets rather than the shares of the legal entity.

This approach often enables investors to isolate commercially valuable assets while reducing exposure to certain historical liabilities.

Nevertheless, Bulgarian legislation still imposes important legal consequences.

Under Article 15 of the Commercial Act, liabilities connected with the transferred enterprise may continue to affect both parties, making legal due diligence equally important regardless of the transaction structure.

The final choice between a Share Deal and an Asset Deal should therefore be based on the legal findings obtained during the due diligence process rather than on tax or commercial considerations alone.

The Objectives of Legal Due Diligence

Although every acquisition is unique, the primary objectives of legal due diligence remain broadly consistent.

A comprehensive review should enable the purchaser to:

• verify ownership of the business and its assets;

• identify actual and contingent liabilities;

• assess regulatory compliance;

• confirm the validity of material contracts;

• evaluate employment obligations;

• identify tax risks;

• verify ownership of intellectual property;

• review pending or threatened litigation;

• determine whether the purchase price accurately reflects the legal condition of the business.

Equally important, due diligence provides the factual basis for negotiating contractual protections within the acquisition agreement.

Issues identified during the investigation frequently influence:

• the purchase price;

• payment mechanisms;

• indemnification provisions;

• representations and warranties;

• escrow arrangements;

• post-completion obligations.

Without a detailed legal review, these matters are often negotiated on assumptions rather than verified legal facts.

Main Stages of the Due Diligence Process

Legal due diligence should follow a structured methodology rather than an informal document review.

Although the precise scope varies depending on the nature of the business, the process generally consists of four principal stages.

1. Defining the Scope of the Review

The investigation should begin by identifying the legal issues most relevant to the target company's business activities.

For example, acquisitions involving technology companies typically require an extensive review of intellectual property rights, software licences, and data protection compliance.

Manufacturing businesses, on the other hand, generally require greater attention to environmental regulation, occupational health and safety, and regulatory permits.

Establishing the scope of the review at an early stage ensures that legal resources are directed toward the areas presenting the greatest commercial risk.

2. Collecting Corporate Documentation

The seller ordinarily provides access to the documentation required for the investigation through a Virtual Data Room (VDR).

Typical documentation includes:

• constitutional documents;

• shareholder resolutions;

• commercial agreements;

• financial information;

• employment records;

• tax documentation;

• regulatory licences;

• court decisions;

• insurance policies;

• intellectual property registrations.

The completeness of this documentation is fundamental to the reliability of the due diligence exercise.

3. Legal Analysis

During this stage, each document is examined to determine:

• whether it is legally valid;

• whether it remains enforceable;

• whether it complies with applicable legislation;

• whether it creates actual or potential legal risks.

The review also seeks to identify inconsistencies between corporate records, contractual arrangements, public registers, and regulatory filings.

4. Reporting and Risk Assessment

The final due diligence report should present far more than a list of identified issues.

An effective report categorises each risk according to its legal significance, explains its potential commercial impact, and recommends practical methods for mitigating that risk through transaction documentation or post-closing measures.

In practice, the report often becomes one of the principal negotiation tools during the final stages of the acquisition.

Corporate Due Diligence: Verifying Ownership and Corporate Authority

One of the first priorities in any business acquisition is confirming that the target company has been properly established, is legally compliant, and that the proposed seller has the authority to dispose of the business or ownership interests.

Corporate due diligence extends far beyond obtaining a current extract from the Bulgarian Commercial Register. A thorough investigation examines the company's legal history from incorporation through to the proposed transaction, ensuring that previous corporate actions have been validly adopted and properly registered.

The review should include, among other matters:

• the Articles of Association or Memorandum of Association;

• amendments to the constitutional documents;

• historical entries in the Commercial Register;

• shareholder and board resolutions;

• appointments and dismissals of directors or managers;

• records relating to capital increases or reductions;

• transfers of shares or ownership interests.

The objective is not merely to confirm the company's existence, but to establish whether any irregularities in its corporate governance could affect the validity of the acquisition.

Ownership Structure

Confirming ownership is equally important.

The purchaser should determine whether the proposed seller is the lawful owner of the shares or ownership interests being transferred and whether those interests are free from legal restrictions.

The investigation should also establish whether:

• any pledges or security interests have been created over the shares;

• shareholder disputes are pending;

• pre-emption rights exist in favour of other shareholders;

• corporate approvals are required before completing the transaction.

Failure to identify such issues before completion may delay—or even invalidate—the acquisition.

Corporate Governance Risks

Corporate records often reveal issues that are not reflected in financial statements.

Examples include:

• resolutions adopted without the required majority;

• improperly convened shareholder meetings;

• unauthorised appointments of directors;

• inconsistencies between constitutional documents and public filings;

• failures to register material corporate changes.

Although such deficiencies may appear procedural, they can significantly affect the enforceability of contracts and the validity of corporate decisions.

Reviewing Commercial Contracts

The commercial value of a business depends not only on its assets but also on the contractual relationships that generate its revenue.

Accordingly, legal due diligence should include a detailed examination of all material commercial agreements.

Particular attention should be given to:

• customer agreements;

• supplier contracts;

• distribution arrangements;

• agency agreements;

• lease agreements;

• financing documentation;

• franchise agreements;

• software licences;

• strategic partnership agreements.

The purpose of the review is to determine whether these agreements remain enforceable after completion of the acquisition and whether they expose the purchaser to unnecessary legal or commercial risk.

Change of Control Provisions

One of the most significant contractual risks arises from Change of Control clauses.

These provisions permit the other contracting party to terminate or renegotiate an agreement when ownership of the company changes.

Such clauses are particularly common in:

• commercial leases;

• loan agreements;

• banking facilities;

• supply agreements;

• technology licensing contracts.

Where key contracts contain Change of Control provisions, the purchaser should assess whether prior consent from the counterparty will be required before closing the transaction.

Customer and Supplier Dependency

Legal due diligence should also evaluate commercial concentration.

Where a significant proportion of revenue depends upon a single customer—or where business operations rely heavily on one supplier—the legal implications may be substantial.

Contracts approaching expiry, agreements capable of termination on short notice, or arrangements containing exclusivity obligations may materially reduce the commercial value of the business.

Similarly, restrictive covenants such as non-compete obligations or territorial restrictions may limit future expansion plans following completion.

Review of Borrowings and Security Interests

Corporate liabilities cannot be assessed solely by examining financial statements.

Legal due diligence should identify all forms of indebtedness together with any security granted in favour of lenders or third parties.

The investigation should include:

• loan agreements;

• overdraft facilities;

• leasing arrangements;

• guarantees;

• mortgages;

• security assignments;

• financial covenants.

Searches should also be carried out in the Central Register of Special Pledges and the Property Register to establish whether assets have been encumbered.

Undisclosed security interests may significantly reduce the practical value of acquired assets and complicate future financing arrangements.

Employment Law Due Diligence

Employees represent one of the most significant legal considerations in any business acquisition.

Bulgarian labour legislation provides extensive protection for employees when a business changes ownership.

Under Article 123 of the Bulgarian Labour Code, employment relationships generally continue automatically following the transfer of a business or commercial enterprise.

Accordingly, the purchaser assumes the position of employer without requiring employees to sign new employment contracts.

Employment Obligations

The legal consequences extend beyond the obligation to continue paying salaries.

The purchaser may also become responsible for:

• accrued holiday entitlement;

• unpaid remuneration;

• statutory compensation;

• contractual benefits;

• obligations arising under collective labour agreements.

For this reason, employment due diligence should examine both individual employment contracts and the wider employment framework within the business.

Employment Documentation

Typical documentation reviewed includes:

• employment contracts;

• supplementary agreements;

• internal employment policies;

• disciplinary records;

• remuneration structures;

• bonus schemes;

• confidentiality agreements;

• non-compete obligations.

Special attention should be paid to unusually generous severance arrangements for senior executives, often referred to as "golden parachutes."

Collective Labour Agreements

Where collective labour agreements apply, their financial and operational impact should be assessed carefully.

Such agreements may continue to bind the purchaser following completion, potentially affecting staffing costs, employee benefits, and workplace policies.

Occupational Health and Safety

Compliance with occupational health and safety legislation should also be verified.

Missing documentation, inadequate workplace procedures, or failures to comply with statutory safety requirements may expose the purchaser to administrative penalties and civil liability following completion.

Tax Due Diligence

Tax risk is frequently one of the most significant issues identified during legal due diligence.

Historical tax liabilities may remain undiscovered for several years and only become apparent following an audit by the Bulgarian tax authorities.

Because the statutory limitation period generally extends to five years, historical transactions continue to carry legal significance long after they have occurred.

VAT Risks under Article 177 of the Bulgarian VAT Act

Particular attention should be paid to Article 177 of the Bulgarian Value Added Tax Act (VAT Act).

This provision allows the tax authorities to impose joint liability where a taxable person knew—or should reasonably have known—that VAT due from another taxable person would not be paid.

Although intended to combat VAT fraud, the practical consequence is that purchasers may inherit significant exposure arising from transactions completed before the acquisition.

Accordingly, tax due diligence should include a detailed examination of the company's historical VAT compliance.

Tax Documentation

The investigation should review:

• corporate tax returns;

• VAT returns;

• tax audit reports;

• correspondence with the National Revenue Agency (NRA);

• outstanding tax assessments;

• ongoing tax inspections.

The objective is to identify recurring compliance issues, unresolved disputes, or aggressive tax positions that may expose the purchaser to future liabilities.

Related-Party Transactions

Transactions between related parties deserve particular scrutiny.

Where pricing differs materially from market conditions, the National Revenue Agency may initiate transfer pricing reviews or reassess taxable profits.

Such risks should be identified before completion and appropriately addressed in the acquisition agreement.

Tax Clearance Certificates

Obtaining tax clearance certificates immediately before closing remains an important step in the acquisition process.

However, purchasers should recognise their limitations.

A certificate confirming the absence of outstanding public liabilities does not prevent future assessments arising from ongoing or subsequent tax audits.

Consequently, tax clearance documentation should be regarded as only one component of a comprehensive tax due diligence exercise rather than definitive evidence that no future tax liabilities exist.

Intellectual Property Due Diligence

For many modern businesses, intellectual property represents one of their most valuable assets. In sectors such as information technology, pharmaceuticals, manufacturing, and consumer products, the commercial value of the company often depends more on its intangible assets than on its physical property.

Legal due diligence should therefore establish not only what intellectual property exists, but also whether the company has clear legal title to those assets and whether its rights are adequately protected.

The review should include:

• registered trademarks;

• patents;

• industrial designs;

• copyrights;

• software ownership;

• domain names;

• trade secrets;

• proprietary databases;

• confidential business information;

• licensing arrangements.

Failure to verify ownership of these assets may expose the purchaser to significant legal and commercial risks after completion.

Ownership of Intellectual Property

One of the most common issues identified during due diligence is uncertainty regarding ownership.

For example, software developed by employees, external consultants, or subcontractors may not automatically belong to the company unless appropriate contractual assignments have been executed.

Similarly, trademarks are sometimes registered in the personal name of a founder or shareholder rather than in the name of the company itself.

The investigation should therefore confirm that:

• intellectual property registrations accurately identify the company as owner;

• assignment agreements have been properly executed where required;

• licence agreements remain valid and transferable;

• ownership disputes are not pending.

Registration and Protection

The legal review should also establish whether valuable intellectual property has been properly protected.

This includes confirming:

• registration of trademarks before the Bulgarian Patent Office where applicable;

• registration under European Union intellectual property systems where relevant;

• timely renewal of registrations;

• payment of official maintenance fees;

• validity of patents and industrial designs.

Where key intellectual property has not been registered, the purchaser should assess whether additional legal protection is available before completion.

Litigation and Dispute Assessment

No business acquisition should proceed without a careful examination of the company's litigation history.

Court proceedings, arbitration, regulatory investigations, and enforcement actions may all have a significant impact on the value of the business.

The purpose of litigation due diligence is not simply to identify ongoing disputes but also to assess their financial and operational consequences.

The investigation should determine:

• whether legal proceedings are pending;

• whether judgments remain unsatisfied;

• whether enforcement proceedings have commenced;

• whether arbitration clauses exist in material contracts;

• whether significant claims are reasonably anticipated.

Particular attention should be paid to disputes involving:

• ownership of assets;

• intellectual property;

• employment matters;

• taxation;

• regulatory compliance;

• environmental liability;

• commercial contracts.

Even litigation with a favourable likelihood of success may consume considerable management resources and generate substantial legal costs.

Regulatory Compliance

Many businesses operate within highly regulated industries.

Accordingly, legal due diligence should determine whether the company possesses every licence, permit, registration, and governmental approval required to conduct its activities lawfully.

Industries commonly requiring regulatory authorisations include:

• financial services;

• insurance;

• transportation;

• healthcare;

• pharmaceuticals;

• telecommunications;

• construction;

• energy;

• waste management;

• gambling.

The review should establish:

• whether all licences remain valid;

• whether renewal requirements have been satisfied;

• whether administrative sanctions have been imposed;

• whether any investigations are ongoing;

• whether licences may be transferred following completion of the transaction.

Certain regulatory approvals under Bulgarian law are personal to the holder and do not automatically pass to the purchaser following an acquisition.

Where this is the case, obtaining replacement licences should form part of the transaction planning process.

Personal Data Protection and GDPR Compliance

Compliance with Regulation (EU) 2016/679 (GDPR) has become a standard component of legal due diligence.

Businesses routinely process personal data relating to employees, customers, suppliers, contractors, and business partners. Failure to comply with applicable data protection legislation may expose the company to substantial administrative fines and reputational harm.

A GDPR review should examine whether the company has implemented appropriate legal and organisational measures, including:

• privacy notices;

• internal data protection policies;

• records of processing activities;

• data processing agreements;

• retention policies;

• information security procedures.

Where applicable, the investigation should also verify:

• appointment of a Data Protection Officer (DPO);

• completion of Data Protection Impact Assessments (DPIAs);

• procedures for reporting personal data breaches;

• mechanisms for responding to requests from data subjects.

Since administrative penalties under the GDPR may reach €20 million or 4% of the undertaking's annual worldwide turnover, deficiencies identified during due diligence should be addressed before completion whenever possible.

Contractual Risk Allocation: Representations, Warranties and Indemnities

Due diligence identifies legal risks; the acquisition agreement determines which party ultimately bears those risks.

For this reason, the findings of the investigation should be reflected in carefully drafted contractual provisions allocating liability between the buyer and the seller.

Among the most significant provisions are the seller's Representations and Warranties.

These contractual statements confirm the legal and commercial condition of the business at the time of signing.

Typical representations include confirmations that:

• the seller has authority to enter into the transaction;

• the shares or business are owned free of encumbrances;

• financial statements fairly present the company's financial position;

• taxes have been properly declared and paid;

• no undisclosed litigation exists;

• regulatory licences remain valid;

• material contracts are enforceable.

Should any representation subsequently prove inaccurate, the purchaser may acquire contractual rights to compensation, subject to the agreed limitations of liability.

Indemnification Provisions

Representations and warranties are usually supported by indemnity clauses that specify:

• the circumstances giving rise to compensation;

• financial thresholds;

• limitation periods;

• procedures for notifying claims;

• exclusions from liability.

Carefully drafted indemnities provide a practical mechanism for recovering losses arising from historical events that pre-date the acquisition.

Escrow Accounts and Purchase Price Protection

Securing payment is an important aspect of transaction structuring.

One of the most widely used mechanisms is an escrow arrangement.

Under this structure, the purchase price—or a specified portion of it—is deposited with an independent escrow agent, commonly a financial institution, solicitor, or notary.

The funds are released only after predetermined contractual conditions have been satisfied.

Typical release conditions include:

• registration of the transfer in the Commercial Register;

• delivery of corporate records;

• transfer of intellectual property;

• confirmation that required regulatory approvals have been obtained;

• submission of agreed closing documentation.

Escrow arrangements protect both parties.

The purchaser receives assurance that funds will not be released until contractual obligations have been fulfilled, while the seller gains confidence that the agreed purchase price has been secured.

Where significant legal risks remain unresolved at completion, parties frequently agree that part of the purchase price will remain in escrow for a specified period in order to secure potential indemnity claims.

Practical Importance of Legal Due Diligence

Although due diligence is frequently viewed as a legal exercise, its practical value extends far beyond regulatory compliance.

A comprehensive investigation enables investors to:

• evaluate the true commercial value of the target business;

• identify hidden liabilities before they become financial losses;

• negotiate more favourable transaction terms;

• determine whether the proposed purchase price accurately reflects the legal risk profile of the company;

• decide whether the transaction should proceed at all.

In many acquisitions, the most valuable outcome of due diligence is not confirmation that the business is legally sound, but early identification of issues that can be resolved before completion.

Conclusion

Purchasing an existing business requires considerably more than a review of financial performance.

Corporate governance, contractual obligations, employment matters, taxation, intellectual property, regulatory compliance, litigation, and data protection each have the potential to affect both the value of the acquisition and the purchaser's future legal exposure.

A structured legal due diligence process provides the information necessary to make informed commercial decisions and reduces the likelihood of inheriting undisclosed liabilities.

Under Bulgarian law, particular attention should be paid to statutory provisions such as Article 15 of the Commercial Act, Article 123 of the Labour Code, and Article 177 of the Bulgarian VAT Act, all of which may significantly influence the legal consequences of a business acquisition.

Ultimately, effective due diligence is not simply about identifying legal defects. It is about understanding risk, allocating responsibility appropriately through carefully negotiated transaction documents, and ensuring that the purchaser acquires not only a commercially attractive business but one whose legal position has been properly examined before the transaction is completed.