Demand Letters in Indonesia: Preparing a Response
Jakarta Law Firm · 22 October 2026
Prepared with AI assistance. General legal information, not advice for an individual matter.
A demand letter, commonly called a somasi in Indonesia, communicates a request to fulfil an obligation. Receiving one is not the same as receiving a court judgment. Begin with the claim, the underlying agreement and evidence of when the letter reached you.
Read the claim against your records
Check the sender, addressee, obligation alleged, amount claimed and response date requested. Compare them with the agreement, orders, invoices and correspondence. Identify missing attachments and retain the complete letter and delivery record. Keep points you accept separate from matters that remain disputed.
A concise chronology helps: what was agreed, what was performed and when the disagreement arose. For payment claims, reconcile invoices, payments and agreed deductions. Do not treat the figure in the letter as established merely because it appears on a law firm’s letterhead.
The legal context requires individual assessment
Articles 1238 and 1243 of the Indonesian Civil Code concern default and compensation for non-performance. The agreement, the obligation and the history of performance need to be read together. A demand letter does not establish every allegation in it, and counting the letters sent is not a substitute for examining the legal position.
Prepare before replying
Identify what you need to clarify and the outcome you wish to discuss. Avoid making admissions, promises or disclosures you do not understand. Preserve correspondence and originals, and tell the lawyer about any response date requested. A general guide cannot determine the appropriate wording or deadline for your particular response.
Do not ignore a letter simply because it is not from a court, and do not publish the other party’s personal information or alter records. Bring the complete letter and supporting agreement to an individual consultation.
Document checklist before a consultation
- The full letter and every attachment.
- Evidence of receipt, including the envelope or electronic delivery record.
- The agreement and any amendments.
- A reconciliation of invoices, payments and disputed amounts.
- A short chronology and the response you wish to discuss.
Common questions
Does a demand letter mean a lawsuit has been filed?
Not necessarily. A demand letter and court proceedings are distinct. Check the document and the procedural steps that have actually occurred.
Must three demand letters be sent?
Do not assume a universal three-letter requirement. The agreement, obligation, timing and circumstances of default require assessment; the number of letters alone does not resolve the issue.
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 demand letter, commonly called a somasi in Indonesia, communicates a request to fulfil an obligation. Receiving one is not the same as receiving a court judgment. Begin with the claim, the underlying agreement and evidence of when the letter reached you.