The best private investigator in Singapore for your case is an agency whose licence details, relevant experience, proposed scope, privacy arrangements and written terms you can assess. Start with the question you need answered, then compare how each agency proposes to investigate it. No agency can guarantee a particular finding.
This checklist from Detective Don PI helps you compare agencies before committing to a service. It is published by an investigation agency, not an independent ranking. Use the same checks for Detective Don PI and any other firm you are considering.
1. Check the agency identity and licence details
Ask for the contracting company name, UEN, agency licence number and expiry date. Check that the details match the quotation and payment recipient. Company registration and an investigation agency licence serve different purposes. Refer to the Singapore Police Force agency licensing information and request clarification if any details are unclear. A licence is not a guarantee of a particular result.
2. Ask about experience relevant to your case
Matrimonial enquiries, child custody concerns and corporate investigations can require different approaches. Ask who will oversee your case and what experience is relevant to your objectives. Read our investigator profiles for background on our team. Professional aliases and obscured photographs may protect operational discretion; they should not prevent you from establishing the identity of the contracting business.
3. Agree the questions and scope in writing
Prepare a short timeline, relevant dates and the specific facts you want to establish. Ask which services are proposed, which are excluded, the planned observation periods and what information is needed from you. Describe concerns as concerns rather than established facts. Avoid sending full personal records until you know which documents are necessary and how to share them securely.
4. Discuss privacy and communication
Ask who will access your information, how updates and reports will be delivered, and what retention and deletion arrangements apply. Agree on a suitable contact method and times for communication, particularly if others can access your phone or email. Ask about practical limitations instead of assuming that confidentiality or non-discovery can be guaranteed in every circumstance.
5. Compare the scope behind each quotation
Check what the quoted fee covers, any minimum deployment periods, expenses, additional personnel, reporting charges and cancellation terms. Ask whether taxes apply and how extra work will be approved. Detective Don PI matrimonial investigations start from S$1,800 and general investigation services start from S$1,200; the actual quotation depends on the case. See our pricing information and request a written quotation for your requirements.
6. Clarify reports and inconclusive findings
Ask what reporting format is included, when you will receive updates, and how observations will be distinguished from interpretation. Findings may be inconclusive. An absence of observed activity does not establish that an incident never happened. No agency should promise that an investigation will produce the outcome you hope for. If you intend to use findings in legal proceedings, discuss your requirements with your lawyer before commissioning work.
7. Read reviews in context
Look for feedback about communication, clarity and professionalism, while remembering that individual reviews cannot predict your outcome. Review client testimonials alongside credentials and the proposed scope. A ranking, award or appearance in a directory does not guarantee results.
Questions to bring to your consultation
Who will oversee the case? What exactly will be investigated? What is excluded? How will my information be handled? What reports will I receive? What could increase the fee? Will extra costs require my approval? What happens if findings are inconclusive?
About this checklist
Published by Detective Don PI Pte. Ltd. as general consumer information, not an independent ranking or legal advice. UEN: 202039824R. Agency licence: L/PS/001381/2026; expiry: 21 April 2029. Contact our team to discuss a case-specific scope and quotation.
7 Responses