Full services Agency for private clients, business, lawyers, families and VIPs.
Independently audited at 97.3% success rate.
LOI Investigations offers a comprehensive range of services tailored for the Bangkok market. We cater to private individuals, businesses, corporates, VIPs, and celebrities, offering services that range from Background Checks & KYC to Technical Counter Surveillance Measures. Our Surveillance solutions are led by former military intelligence officers, ensuring the highest level of professionalism. With a focus on Family Law, we provide tailored solutions that meet the unique legal landscape of Bangkok. We also offer Global Database Access and Asset Tracing & Fraud services for comprehensive investigative needs. Additionally, we provide full services for all types of investigations involved. Our team includes local field investigators covering the whole of Bangkok and South East Asia, as well as private detectives and private investigators.
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International Free Toll: + 44 800 1 934 999
Business Intelligence
LOI Investigations supplies vital Bangkok investigation services and business intelligence to medium-sized corporations in Bangkok and abroad. Utilizing advanced technological tools, we investigate competitors’ processes, practices, research, development, services, and products. Our intelligence is crucial for significant business moves such as acquisitions, mergers, and new partnerships, leading to better performance and positioning in the market.
Asset Tracing & Recovery
Find Hidden Assets with LOI Investigations - Our Asset Tracing and Financial Investigation services are designed to help individuals and businesses identify hidden assets, uncover financial fraud, and protect their financial interests. We specialize in tracing assets such as bank accounts, real estate properties, and investment portfolios. Contact us today to discuss your asset tracing needs and how we can help you protect your financial interests.
Background Checks
LOI Investigations specializes in accurate and thorough background checks for individuals and companies. Offering pre-employment background checks, including verification of education, employment history, and criminal record checks, our experienced private investigators ensure the safety and security of your business and personal life. Trust LOI Investigations for reliable Private investigation services Bangkok with confidentiality and fast turnaround times.

Cyber Security Investigations
Line of Inquiry offers Cyber Security Investigation services to thwart planned cyberattacks and minimize damage. Utilizing advanced monitoring, intelligence procedures, and in-depth data analysis, we stay ahead of potential cyber threats. Our capabilities extend to accessing information from the dark web, aiding in criminal investigations, fraud, and identity theft cases. Our innovative tools and methods, combined with AI-backed automation and expert human expertise, enable us to identify different types of threats and build defense systems tailored to individual business needs.
Surveillance
At Line of Inquiry, we offer in-house surveillance investigators led by experienced professionals, including a former military intelligence officer and a Senior Surveillance officer with 23 years’ experience. Our surveillance services, available across Bangkok and worldwide, include mobile and static solutions, under-cover work, and the use of advanced technology such as trackers, electronic bugs, and military-grade drones. Whether discreet or covert, our fool-proof method ensures professional evidence gathering to meet your needs.
Global Database Access
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Private Clients
We at Line of Inquiry offer a range of services for private clients, including missing persons tracing, background checks, surveillance, and asset tracing. Specialized services are also available for relationship matters, identity theft, and blackmail. Our experienced team utilizes advanced investigative techniques to provide effective and discreet solutions tailored to individual needs.
Businesses
Line of Inquiry offers a comprehensive suite of services tailored for businesses. These include business intelligence, asset tracing, debtor tracing, and competitive intelligence. Specialized services extend to acquisition and mergers, investment intelligence, and supply chain risk mitigation. Our experienced team employs advanced technological tools and investigative techniques to ensure your business stays ahead in a competitive market.
Relationship Matters & Family Issues
Comprehensive support in family law matters, including relationship disputes and divorce cases. Our services extend to missing persons tracing, surveillance, and personal protection against blackmail. Utilizing advanced technology and an experienced team, we offer discreet and effective solutions tailored to the unique challenges faced by families.
Cyber Investigations
Lawyers
Contact Us
If you need a private investigator for missing persons tracing services worldwide, contact us today. Our investigative services are effective, discreet, and designed to meet your specific needs.
