Contract Breach and Unlawful Acts in Indonesia
Jakarta Law Firm · 22 October 2026
Prepared with AI assistance. General legal information, not advice for an individual matter.
A contract-breach claim and a claim based on an unlawful act are different legal starting points. A loss alone does not determine which applies. The relationship, the source of the obligation and the disputed conduct need to be examined together.
Identify the source of the obligation
For an alleged contractual failure, the agreement, amendments and performance records are central. An unlawful-act claim requires analysis of the alleged conduct and the elements to be proved. Relevant Civil Code references include Article 1365 for unlawful acts and Articles 1238 and 1243 concerning default and contractual compensation.
The distinction affects the facts to explain, the relief sought and the evidence. It is not resolved by choosing a label for a letter. Several legal relationships may arise from the same events, so complete documents matter.
A short comparison
| Starting point | Contract breach | Unlawful act |
|---|---|---|
| Focus | The agreed obligation and its performance. | The alleged unlawful conduct and required elements. |
| Initial records | Contract, amendments, performance and correspondence. | Chronology, loss records and evidence of causation. |
| Introductory references | Civil Code Articles 1238 and 1243, among others. | Civil Code Article 1365, among others. |
Separate the agreement from what happened
Keep the original contract, annexes, changes and scope discussions. Record delivery, progress, payment and objections separately. A payment dispute, for example, needs to be read against the performance milestones agreed. This is an illustration of the review needed, not a conclusion about either party’s liability.
Prepare the loss and procedural history
List the losses alleged and the records supporting each. Distinguish unpaid sums, additional expenses and estimates. Explain why the event is said to have caused the loss. Evidence preparation does not mean every amount will be recoverable.
Mention earlier demands, responses, settlements and any negotiation or arbitration clause. Avoid copying a pleading or combining legal grounds simply because an online example does so. Individual advice is needed before selecting a claim or response.
Document checklist before a consultation
- The agreement, annexes and changes to obligations.
- Delivery, performance and payment records.
- Earlier objections, demands and replies.
- A loss schedule supported by records for each item.
- Dispute-resolution clauses and negotiation records.
Common questions
Does a business loss automatically establish a contract breach?
No. The obligation, relationship, conduct, loss and supporting evidence require assessment.
Does a contract alone determine the legal basis of a claim?
No. The relationships, conduct and elements of the proposed claim need examination. Selecting a legal basis is more than changing a label in a template.
Discuss your own circumstances
To discuss your records and assistance needs, explore the relevant practice area and contact the firm with a short summary. The scope of an engagement and fees require further discussion.
Official sources and further reading
Related reading
About this information
This article provides general information and preparation guidance, not advice on a particular matter. Applying the law requires review of the facts, records and current rules.
Jakarta Law Firm
A contract-breach claim and a claim based on an unlawful act are different legal starting points. A loss alone does not determine which applies. The relationship, the source of the obligation and the disputed conduct need to be examined together.