Our Professional Investigative Services

Comprehensive solutions for all your investigative needs with the highest level of confidentiality

Relationship & Personal Investigations

Adultery or Infidelity Investigations (Marital)

Discreet adultery investigations in Nigeria using surveillance, OSINT, and undisclosed methods to uncover infidelity evidence for legal or personal use. 100% confidential.

Unfaithful or Cheating Partner (Non-Marital)

Similar to infidelity investigations for married couples, we discreetly gather evidence for non-married partners using surveillance, OSINT, and undisclosed methods. 100% confidential.

Stalking and Harassment Investigations

Tracking the source of repeated, unwanted attention or threats—online or in person—toward an individual.

Surveillance (Beacon or GPS Tracking)

Discreet real-time GPS and beacon surveillance in Nigeria, using OSINT and undisclosed methods to track location data for infidelity, theft, or fraud cases. 100% confidential.

Digital & Cyber Investigations

Computer Forensics Investigation

Extraction and analysis of digital evidence from computers and devices to uncover data theft, online fraud, unauthorized access, or digital tampering.

Email Tracking and SMS Tracing

Monitoring or tracing the origin of suspicious emails or SMS messages, especially in cyberstalking, fraud, or extortion cases.

Online Social Networking Investigation

Monitoring and analyzing a person's activities, contacts, or suspicious behavior on platforms like Tinder, Bumble, Grindr, Facebook, Instagram, WhatsApp, or Twitter.

Identity Theft

Investigating the use of someone's personal information (name, ID, bank details) without consent, usually to commit fraud or impersonation.

Fraud & Reputation Investigations

Financial Fraud Investigations

Uncovering deceptive financial schemes such as embezzlement, Ponzi schemes, or fake investment opportunities. Can involve tracing transactions and asset verification.

Real Estate Fraud Investigations

Detecting property scams, fake titles, double sales, or misrepresented real estate deals—common in Nigeria's property market.

Internet Defamation and Slander Investigations

Tracking the source of false, damaging statements made online to harm reputation, often involving legal action or cease-and-desist orders.

Unmasking an Online Bully/Scammer

Reveals the true identity behind the digital disguise, stripping away anonymity to hold online predators accountable for their harassment and fraudulent activities.

Discreet. Professional. Thorough.

The Greyline Investigations Approach

Looking for a trusted private investigation company in Nigeria? At GreyLine Investigations, we offer discreet, reliable, and affordable private investigation services in Lagos and across Nigeria. Our team of experienced private investigators in Lagos, Abuja, Port Harcourt, and Kano specialize in a range of services including Infidelity Investigations, Online Social Networking Investigation, Internet Defamation and Slander Investigations in Nigeria, and Surveillance (Beacon or GPS Tracking) services in Nigeria.

As a licensed and professional private detective agency in Nigeria, we understand the importance of confidentiality, legal compliance, and accurate reporting. Wondering how to hire a private investigator in Nigeria or is private investigation legal in Nigeria? GreyLine Investigations operates strictly within the laws of the Federal Republic of Nigeria, ensuring your investigations are handled legally and ethically.

Whether you’re searching for the best private investigators in Nigeria, need to hire a private investigator in Nigeria, or want to know how much it costs to hire a private investigator in Lagos, our expert team is ready to assist. From Stalking and Harassment Investigations to Email Tracking and SMS Tracing and Identity Theft investigations, we are your go-to private investigation firm in Nigeria.

Contact us today to discover who is the best private investigator in Nigeria and how to find a private investigator in Nigeria you can trust. GreyLine Investigations — delivering discreet, legal, and results-driven private investigation services in Lagos and beyond.

Contact Us

We understand the need for discretion. Contact us for a confidential consultation about your case.

Get In Touch

All inquiries are kept strictly confidential. We operate with the highest standards of privacy and discretion.

📱 Phone: +234 812 524 7802 (Whatsapp Only)

✉️ Email: greylineinvestigations@atomicmail.io

Case Inquiry