Software Development Project Fails in Turkey: Source Code, Payment and Compensation Disputes 2026 Updated Guide

Software development project fails in Turkey? Learn about source code delivery, unpaid development fees, defective software, project delays, intellectual property rights, termination and compensation claims under Turkish law.

Software development disputes in Turkey frequently become more complicated than ordinary unpaid-invoice cases. A failed project may involve unfinished software, inaccessible source code, missed milestones, defective functions, intellectual property ownership, third-party libraries, cloud infrastructure, confidential business information and substantial operational losses. The first legal question is therefore rarely limited to “Who owes the money?” The parties must determine what was contractually promised, which deliverables were completed, whether the software was accepted, who owns the relevant intellectual property rights and what losses were actually caused by the project failure.

Why Do Software Development Projects Fail?

Common causes include unclear project specifications, continuous scope changes, unrealistic deadlines, inadequate testing, delayed customer approvals, integration problems, insufficient technical documentation, disagreement over milestones and failure to define intellectual property ownership.

Many disputes begin because the contract describes the project commercially but does not define acceptance criteria technically.

Start With the Software Development Contract

The contract should be reviewed together with annexes, statements of work, technical specifications, quotations, project plans, change requests and correspondence.

The legal analysis should identify the promised software, completion date, milestones, payment schedule, acceptance procedure, intellectual property provisions and termination rights.

What Exactly Was the Developer Required to Deliver?

“Developing software” can include many different obligations. The contract may require source code, executable software, mobile applications, APIs, database structures, technical documentation, administrator credentials, deployment scripts, testing environments and training.

Each deliverable should be identified separately.

Source Code Is Often the Central Dispute

A customer may have paid substantial development fees but still be unable to operate or continue the project because the developer refuses to provide the source code.

Whether the customer can demand delivery depends heavily on the contract, project structure, intellectual property arrangements and circumstances surrounding termination.

Paying for Development Does Not Automatically Resolve Every IP Question

Payment of development costs and ownership of intellectual property rights should not automatically be treated as identical concepts.

The contract should clearly address the rights granted or transferred in relation to the software.

Intellectual Property Clauses Must Be Reviewed Carefully

The parties should determine whether the agreement contains provisions concerning transfer of economic rights, licensing, exclusivity, modification, reproduction, distribution, adaptation and use of the software.

Ambiguous language can create major disputes after the commercial relationship ends.

Pre-Existing Software Must Be Distinguished

A developer may use frameworks, modules or software components that existed before the customer project began.

The customer should distinguish newly developed project-specific code from the developer’s pre-existing technology.

Third-Party Software Can Create Additional Problems

Modern software commonly contains open-source libraries, commercial components, APIs and third-party services.

The contract should allocate responsibility for licenses and restrictions affecting these components.

Open-Source Components Should Be Identified

Open-source software is not automatically unrestricted software. Different licenses impose different obligations.

A technical audit may be required to identify which components were incorporated into the project.

What If the Developer Refuses to Deliver the Source Code?

The customer should first preserve the contract, payment records, correspondence and evidence showing the agreed deliverables.

A formal demand may then be considered, followed where necessary by contractual, judicial or other legal remedies depending on the circumstances.

Source Code Repositories Can Become Critical Evidence

Git repositories and similar development systems may contain commit histories, branches, contributor information and timestamps showing how the project progressed.

Preserving this information can be extremely important before access is terminated.

Do Not Delete or Alter Repository Evidence

Once a dispute becomes foreseeable, both parties should preserve relevant electronic evidence.

Deleting repositories, modifying commit histories or removing access records can make the technical and legal dispute substantially more difficult.

Cloud Infrastructure Credentials Should Be Secured

Failed projects often involve hosting platforms, databases, domain accounts, cloud servers and deployment systems controlled by the developer.

The customer should determine who legally owns the relevant accounts and who currently has administrative access.

Business Continuity Must Be Protected

A legal dispute should not unnecessarily turn into a complete operational shutdown.

Where possible, businesses should preserve backups, database access, administrator credentials and infrastructure documentation while the substantive dispute is being resolved.

Can the Customer Stop Paying the Developer?

This depends on the contractual obligations and nature of the alleged breach.

If payments are linked to milestones or acceptance, determine whether the contractual conditions for payment were satisfied. The customer should avoid withholding payments without examining the legal consequences.

Can the Developer Claim Unpaid Fees?

Potentially. A developer that completed the agreed work may pursue unpaid invoices or contractual remuneration.

The customer may respond with defenses concerning incomplete work, defects, delay, failure of acceptance or other contractual breaches where supported by evidence.

Milestone Payments Require Milestone Evidence

For milestone-based projects, determine exactly what each milestone required.

Invoices alone may not establish successful completion if payment was conditional upon delivery, testing or acceptance.

Acceptance Procedures Are Crucial

Contracts should define how the customer tests and accepts the software.

A dispute can arise where the developer claims implied acceptance because the software was used while the customer argues that significant defects remained unresolved.

Does Using the Software Mean It Was Accepted?

Not necessarily in every case.

Production use may be relevant evidence, but the complete contractual arrangement, reservations, defect notifications and circumstances of use should be considered.

Defective Software Must Be Documented

Avoid vague complaints that the software “does not work.”

Create a defect list identifying the function, expected result, actual result, severity, reproduction steps and supporting screenshots or logs.

Critical and Minor Defects Should Be Distinguished

A cosmetic interface problem is different from a security vulnerability or failure that prevents the core system from operating.

The legal significance of a defect may depend partly on its impact on the intended use of the software.

Independent Technical Expert Evidence May Be Necessary

Software disputes frequently require technical expertise.

An independent expert can assess completion percentage, code quality, missing functionality, security issues, documentation and whether the software corresponds to contractual specifications.

Court-Appointed Expertise Can Become Important

Where litigation arises, technical issues may require expert examination.

The parties should therefore preserve the software environment and evidence necessary for meaningful technical analysis.

Project Delays Can Lead to Compensation Claims

If the developer misses the agreed completion date, the customer may potentially claim contractual remedies depending on the agreement and circumstances.

The first question is whether the delay is legally attributable to the developer.

Customer-Caused Delay Must Also Be Considered

The customer may have delayed approvals, failed to provide required data, repeatedly changed specifications or failed to supply necessary integrations.

A project timeline should identify delays attributable to each party.

Scope Creep Is a Major Source of Disputes

Customers frequently request additional features during development.

Developers should document whether those requests are included in the original price or constitute additional work.

Change Requests Should Be Preserved

Emails, tickets and project-management records can show when requirements changed and whether additional fees or time were agreed.

Informal scope expansion can significantly complicate litigation.

Can the Customer Terminate the Software Contract?

Potentially, depending on the contractual terms, applicable law and seriousness of the breach.

Before termination, determine whether notice, cure periods or other procedural steps are required.

Wrongful Termination Can Create Counterclaims

A party that terminates without sufficient contractual or legal basis may itself face compensation claims.

Termination should therefore be supported by a documented chronology of breach.

What Happens to Source Code After Termination?

This should ideally be addressed expressly in the contract.

Relevant questions include whether completed code must be delivered, whether partially completed code is included, which rights transfer and whether outstanding payments affect delivery obligations.

Source Code Escrow Can Reduce Future Risk

For business-critical software, source-code escrow arrangements may help reduce dependency on a single developer.

Escrow terms should define release events such as insolvency, prolonged support failure or specified contractual breaches.

Can the Customer Hire Another Developer?

Potentially, but intellectual property and confidentiality issues should be reviewed first.

The replacement developer should not be given unauthorized access to proprietary materials belonging to the original developer.

Confidential Business Information Must Be Protected

Software projects may give developers access to customer lists, pricing data, algorithms, internal workflows and other commercially sensitive information.

Confidentiality obligations should continue to be reviewed after termination.

Personal Data Can Create Additional Exposure

Where the software processes personal data, the parties should identify their respective responsibilities concerning access, security, transfer and deletion.

A commercial dispute should not result in uncontrolled handling of personal data.

Cybersecurity Defects May Increase Damages

A failed development project can involve vulnerabilities rather than merely missing features.

Preserve penetration-test reports, security alerts, logs and incident records where cybersecurity is part of the dispute.

Can Lost Profits Be Claimed?

Potentially, but lost-profit claims generally require strong evidence concerning causation and amount.

A hypothetical claim that the software “would have generated millions” may be difficult to establish without reliable commercial evidence.

Direct Losses Are Usually Easier to Document

Potential losses may include replacement-development expenses, emergency technical support, migration costs and other directly attributable expenses, depending on the contractual and legal basis.

Every expense should be documented.

Avoid Double Recovery

The claimant should distinguish between amounts paid for unusable work, corrective costs, replacement costs and claimed lost profits.

Different heads of loss should not be duplicated.

Contractual Penalties Should Be Reviewed

Some development agreements contain penalty clauses for delay, service failures or missed milestones.

Their wording, triggering conditions and enforceability should be examined carefully.

Liability Caps Can Be Important

Technology contracts frequently limit liability to a specified amount.

Determine whether the limitation covers the particular claim and whether any contractual exceptions apply.

Warranty Clauses Should Be Examined

The agreement may include a post-delivery warranty period for correcting bugs.

Determine whether the disputed problem is covered by the warranty or constitutes additional development.

Maintenance and Development Are Different

A developer may be required to fix defects but not to build new features indefinitely without additional payment.

The contract should distinguish maintenance, support and new development.

Evidence From Project-Management Platforms Matters

Task histories, issue trackers, sprint records and comments may establish which functions were requested, completed, rejected or delayed.

Preserve exports of relevant project records where possible.

WhatsApp and Email Correspondence Can Also Matter

Informal communications can reveal acceptance, change requests, deadline extensions and defect notifications.

Relevant correspondence should be preserved in its original context.

Foreign Companies Should Review Governing Law and Jurisdiction

International software projects may involve a foreign customer or developer and a Turkish counterparty.

The contract should be examined for governing law, jurisdiction and arbitration clauses before proceedings are initiated.

Arbitration May Be Available

Where the contract contains a valid arbitration agreement, software-development disputes may be resolved through arbitration rather than ordinary courts.

The scope of the arbitration clause should be checked carefully.

Interim Measures May Be Necessary

Urgent circumstances may require protection of source code, servers, databases, repositories or other digital assets before the main dispute is resolved.

The availability of interim judicial or arbitral measures depends on the circumstances and applicable procedure.

Evidence Preservation Should Begin Immediately

Before sending aggressive termination notices, secure copies of contracts, repositories, technical specifications, invoices, payment records, correspondence, server logs, acceptance records and defect reports.

Digital evidence can change quickly.

Consider an Independent Software Audit

A technical audit can answer several critical questions: How much of the project is actually complete? Is the source code usable? Can another developer continue the project? Are there security vulnerabilities? Does the code match the agreed specifications?

These answers can materially affect settlement strategy.

Settlement May Be More Valuable Than Immediate Litigation

Where the customer urgently needs the software operational, a structured settlement may provide source-code delivery, credentials, documentation and transition assistance while financial claims are reserved or resolved separately.

Commercial continuity should form part of the legal strategy.

Immediate Legal Strategy

When a software development project fails in Turkey, the parties should immediately preserve digital evidence, review the development contract and specifications, identify completed and missing deliverables, secure repository and infrastructure evidence, determine intellectual property ownership, document defects and delays, reconcile payments with milestones, calculate provable losses, review termination procedures and obtain technical expert assistance where necessary.

Frequently Asked Questions

Can a customer demand source code after paying for software development?

Potentially, but payment alone does not answer every source-code or intellectual-property question. The contract and rights granted or transferred must be examined.

Can a developer refuse to deliver source code because invoices are unpaid?

The answer depends on the contract, payment status, agreed deliverables and applicable legal rights. Both the payment and delivery obligations should be analyzed together.

Can defective software justify withholding payment?

Potentially, depending on the seriousness of the defects, contractual payment conditions and applicable remedies.

Can the customer claim compensation for project delays?

Potentially. The customer must establish the relevant breach, causation and compensable loss.

Can lost profits be claimed?

Potentially, but they usually require persuasive evidence demonstrating both causation and the amount of loss.

Who owns custom-developed software?

Ownership and exploitation rights should be determined by examining the contract, applicable intellectual property rules and the circumstances in which the software was created.

Can another developer continue the unfinished project?

Potentially, but source-code access, intellectual property rights, confidentiality and third-party licensing should be reviewed first.

Are Git records useful evidence?

Yes. Repository history can provide important evidence concerning development progress, contributors and timing.

Can urgent measures be obtained to protect source code?

Depending on the circumstances, interim measures may potentially be considered where digital assets or evidence are at risk.

What should a company do first when a software project collapses?

Preserve the source code, repositories, credentials, technical specifications, project records and payment evidence before access or digital information can be changed. Then determine separately who owns the software, what remains unfinished and which financial losses can actually be proven.

Client-Focused Legal Support for Software Development Disputes in Turkey

Software disputes can involve source-code delivery, intellectual property ownership, unpaid invoices, defective software, missed milestones, project termination, confidentiality, cybersecurity and substantial compensation claims. Fırat Fesih Kaya Law Office assists Turkish and foreign companies in technology and software-development disputes arising in Turkey. Lawyer Fırat Fesih Kaya provides legal assistance in contract analysis, source-code and intellectual-property disputes, evidence preservation, payment and compensation claims, termination strategies, settlement negotiations and litigation or arbitration arising from failed software projects.

Phone:
+90 312 434 22 22

Mobile:
+90 532 769 22 22

Email:
info@firatfesihkaya.av.tr

Address:
Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey