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Page Updated: 19/10/26
Infidelity Investigator: A Private Investigator for Infidelity in 170+ Countries
Low Cost Detectives Infidelity Investigator. Suspicion is exhausting, and guessing does not end it. An infidelity private investigator gathers lawful evidence, so you can stop wondering and decide what comes next.
Speak to an InvestigatorA cheating private investigator works from facts, not feelings. We use discreet surveillance and loyalty testing. Our written report sets out what we saw, with photos or video where the law allows. Your partner is never alerted.
You do not have to face this alone. Speak to one of our investigators today, in complete confidence.
All inquiries are treated in complete confidence. Your investigation is private from first contact to final report.
Why Choose Low Cost Detectives as Your Infidelity Private Investigator
Our investigators are fully licensed, with over 30 years of professional experience. With 300+ branches in 170+ countries, we can follow a case across borders. That includes business trips and second homes abroad.
One Lead Investigator owns your case and keeps you updated throughout the process. You set the objectives, and we report only what we observe. Infidelity work is part of our wider relationship investigations.
30+ Years of Experience
Our investigators have worked on infidelity cases for over three decades.
170+ Countries Covered
Local investigators in 300+ branches, wherever your partner travels.
24/7 Availability
Our team answers around the clock, every day of the year.
95% Global Success Rate
We hold a 95% global success rate across our investigations.
Get in Touch with our Expert Infidelity Investigators
0044 800 193 6162 (Global Clients)
Infidelity Investigation Services for Every Situation
Every case starts with a suspicion and a question. As your private investigator for cheating, we match the method to your situation and local law.
Surveillance
A two-person team records your partner's movements and who they meet. You receive timestamped photos or video where local law allows. See our surveillance investigations.
Loyalty Test
A trained agent makes natural contact with your partner in a setting they visit. The agent responds to their conduct and records it, but never leads it. Learn about our loyalty test.
Online Infidelity
Some affairs start and stay online. Our online loyalty test shows how your partner responds to contact on social media. Read more about digital infidelity.
Before Marriage
Doubts before a wedding deserve answers. Our premarital background checks confirm who your partner says they are.
Divorce and Custody
Facts matter when a marriage ends. Our divorce investigations provide factual reports your attorney can review.
Partners Abroad
Long-distance relationships and frequent travel are hard to check from home. Our local investigators work where your partner is.
You Deserve the Truth
Tell us what has changed. An infidelity investigator will explain the options and what each can show, in complete confidence.
Speak to an InvestigatorInquiry Form - Reach Out to Our Team
Your inquiry is completely confidential. We never share your details.
How an Infidelity Investigation Works, Step by Step
Our infidelity investigations follow four steps, from your first message to a written report.
Tell Us What Has Changed
Share what worries you: new routines, unexplained absences, or a change in behavior. Include your partner's usual schedule and the places they visit.
We Agree the Approach
A Lead Investigator reviews your case and recommends surveillance, a loyalty test, or both. We explain what each can and cannot show before you commit.
We Gather Evidence
Our experienced investigators work discreetly and within legal boundaries. You receive regular updates while the work is under way.
You Receive the Report
The report sets out what we observed, with times, places, and photos or video where the law allows. It ends with recommendations for your next steps.
Client Reviews
What Our Infidelity Clients Say About Us
From clients who suspected a partner and wanted the facts
★★★★★
Low Cost Detectives helped me with personal surveillance when I had suspicions about my spouse. Their professionalism and discretion were commendable. I felt supported throughout the process.
Mei, Singapore City, Singapore · Personal Surveillance Infidelity
★★★★★
I needed to understand the truth about a relationship, and Low Cost Detectives provided the answers. Their relationship investigation service was thorough, and they treated my case with empathy and respect.
James, Manchester, UK · Relationship Investigation
★★★★★
This company are simply amazing. My life was in tatters. Husband giving me constant red flags yet making me feel like I was going crazy. Lowcostdetectives worked with me to create the perfect profile who I knew he would not be able to resist. They did not rush contact and found a way to pretty much make him come to us. Unfortunately he proved himself disloyal however I feel so much better now I know the truth and have the evidence I needed
Usma, Dubai, UAE · Infidelity Suspicions
★★★★★
I had been dating someone for a while, and things were getting serious. But before taking the next step, I needed to be sure of her loyalty. I reached out to Low Cost Detectives for their In-Person Honey Trap Service. They assigned a professional agent to approach her and see if she would show any interest. I was nervous and anxious, but the team at Low Cost Detectives kept me informed throughout the process. To my great relief, she showed no interest in the agent and remained faithful to our relationship. The In-Person Honey Trap Service not only confirmed her loyalty but also strengthened my trust in her. I'm grateful to Low Cost Detectives for their ethical approach, clear communication, and the peace of mind they provided. We're now happily married, and I owe a big thanks to their team for helping me make the right decision.
Jamie, Toronto, Canada · In-Person Honey Trap Service
Read more client reviews.
Why an Infidelity Investigator Beats Guesswork
We help you replace uncertainty with facts, gathered lawfully and reported plainly.
An infidelity investigator gives you evidence to act on, whatever it shows.
When Suspicion Takes Over
Weeks of doubt wear people down, and partners often deny what they are asked. Our free suspicious behavior check is a good first step. An investigation gives you answers.
Lawful Methods Only
We do not install tracking apps, and we never access your partner's phone, messages, or accounts. Our investigators observe public places and record what they see.
Evidence You Can Use
Our reports are factual and dated, with photos or video where the law allows. Your attorney can advise how they may help in divorce proceedings, a divorce settlement, or child custody.
Discreet From Start to Finish
Your partner is never alerted, and your case stays confidential. You decide what happens with the findings.
Wherever They Are
Business trips, travel, and long-distance relationships do not end the work. Our local investigators know the law in each country where they operate.
Frequently Asked Questions About Hiring an Infidelity Investigator
Common questions from clients considering an infidelity investigator
What does an infidelity private investigator do?
An infidelity private investigator gathers lawful evidence about a partner's movements, meetings, and conduct. At Low Cost Detectives, that usually means discreet surveillance, a loyalty test, or both. Every finding is recorded with times, dates, and places. You then receive a written report, so your next decision rests on facts rather than suspicion.
How does a cheating private investigator prove an affair?
By documenting what happens, where it happens, and when. A two-person surveillance team records who your partner meets, with timestamped photos or video where the law allows. In countries that do not allow filming, our investigators keep a detailed written log instead. A loyalty test adds evidence of how your partner responds to a natural approach.
Is it legal to hire a private investigator for infidelity?
Yes, as long as the investigator uses lawful methods. Our investigators observe public places and follow the law of the country where the work takes place. We do not install tracking apps, and we never access phones, messages, or accounts. If a request would break the law, we decline it and explain why.
How long does an infidelity investigation take?
It depends on your partner's routine and what you need to know. Surveillance typically runs over three days or nights. We plan it around the times that matter most, such as a late meeting or a business trip. A loyalty test needs time to set up a natural approach. We agree the timing with you before any work begins.
Will my partner know they are being investigated?
No. Our investigators work discreetly and never alert or approach the person under surveillance. In a loyalty test, the agent behaves like an ordinary member of the public. Your partner is not told that it was a test. Your case stays confidential, and you decide what happens with the findings.
Can you investigate online cheating?
Yes. Some affairs start and stay online, often on social media. Our online loyalty test shows how your partner responds when someone new makes contact. You receive the findings in a written report, as with any other case. For wider concerns, see our digital infidelity page.
What if the investigation finds nothing?
Then you have an answer too. Many clients simply want to know, and a clear report can ease months of doubt. Some cases end with a partner cleared, as one of our reviewers found after a loyalty test. We report only what we observe, whatever it shows.
Replace Suspicion With Evidence
Our infidelity private investigators gather lawful evidence. You receive a written report you can act on.
Start Your InvestigationInfidelity Investigator | Africa | Asia | Europe | North America | Oceania | South America
Infidelity Investigator Interesting Links and Articles:
1. GOV.UK: Get a divorce
In England and Wales, a divorce needs a marriage of over a year that has permanently broken down.
2. Cornell Law School: Adultery
Cornell's Legal Information Institute explains when adultery is a ground for a fault divorce in the US.
3. Relate: I found out my partner is having an affair
Relate, the UK relationship charity, sets out practical steps for coping after an affair is discovered.
