Private Investigator vs. Security Personnel: What’s the Difference and Which Do You Need?

Private investigators and security personnel are both essential in the protection of your interests. But keeping track of which one to call can be confusing — particularly amid overlapping responsibilities of surveillance and information gathering.

At Baker Street Private Investigator (BSPI), we have experience dealing with clients in different business sectors, assisting them in determining if they require private investigation services or on-ground security personnel. Here’s how they compare — and when you might need one over the other.

Understanding the Core Differences

Let’s break it down:

• Private investigators in Singapore are trained agents who specialise in covert operations — things like carrying out background checks, matrimonial investigation and infidelity surveillance.
• Security personnel, however, are trained specifically for physical protection, access control and emergency response.

Here’s what sets them apart:

• Scope of Duties:
  
  • Private investigators: evidence gathering, surveillance, and investigation services.
    
  • Security personnel: patrolling, access control, and incident response.
    
• Nature of the Investigation:
  
  • PIs dig deep into confidential and sensitive matters like child custody, a cheating spouse, or a missing person case.
    
  • Security teams ensure peace and order on premises—ideal for events, malls, and commercial buildings.
    
• Legal Framework:
  
  • Private investigators operate under the Private Security Industry Act and must be licenced by the Singapore Police.
    
  • Security personnel are typically deployed through licenced security agencies.

Are Private Investigators Legal in Singapore? [What You Should Know]

Yes, private investigators are legal in Singapore—but only if they are licenced under the Private Security Industry Act. They must comply with strict regulations and obtain approval from the Singapore Police Force. Unlicensed investigators may face penalties and legal consequences. Always ask to verify credentials before hiring a PI.

When to Hire a Private Investigator in Singapore

We recommend clients engage a private investigator in Singapore when they need to know very specific information that will never come across as public information. Here are a couple of examples of how we have been able to help by using our experienced private investigators:

• Infidelity Investigations
  Our licenced private investigators have handled countless cases involving matrimonial cases in Singapore, often supported by surveillance and discreet interviews.
  
• Background Checks for Employees or Business Partners
  Whether it’s a hiring decision or a potential investment, our confidential services can uncover red flags before it’s too late.
  
• Child Custody Disputes
  Our investigators gather evidence that can be used in court, giving you peace of mind and leverage in legal situations.

What Can Private Investigators Do in Singapore (and What They Can’t)?

Private investigators can carry out criminal investigations, background checks, surveillance and more. But they can’t hack devices, break into private property or pretend to be law enforcement.

When to Use Security Personnel Instead

While PIs work behind the scenes, security personnel are your front liners. You’ll likely need security services in the following cases:

• Crowd Control at Events
  They’re trained to handle large gatherings and emergency response.
  
• Retail Loss Prevention
  Many retail chains in Singapore rely on security personnel to monitor CCTV and prevent theft.
  
• Personal Bodyguard Services
  If physical safety is your concern—say, during high-profile public appearances—this is where security teams shine.

Security personnel don’t typically offer investigation services, so when in doubt, choose based on the nature of the investigation and the range of services required.

Private Investigator vs. Police in Singapore: Who Should You Call?

If there’s an active crime or safety risk, contact the police immediately. Private investigators are ideal when you’re seeking answers on private matters that may not qualify for police intervention—like matrimonial investigation or verifying suspicions discreetly. PIs cannot arrest or interrogate suspects, but they can uncover the truth and provide useful documentation.

We at BSPI Know Which to Recommend—And When

When clients come to us unsure of whether they need a PI or a security professional, we start by understanding their goals. At Baker Street Private Investigator (BSPI), we provide more than just private investigation services in Singapore—we offer clarity.

We’ve helped companies decide between hiring a private investigator or setting up a dedicated security protocol through our industry partners. We’ve even advised clients on how to comply with the Private Security Industry Act when cases involve both surveillance and onsite presence.

Whether it’s a commercial investigation, a matrimonial case, or simply a need for discreet observation, our team of private investigators is trained to respond with professionalism, tact, and insight.

Licensed vs. Unlicensed Private Investigators in Singapore: What’s the Risk?

Hiring an unlicensed private investigator is risky. They may use illegal methods or submit evidence that won’t hold up in court. Always go for a licensed private investigator to ensure the work is conducted legally, ethically, and securely—your case depends on it.

Bullet Summary: Key Differences Between PIs and Security Personnel

• Training
  
  • PIs: Trained in investigative services, legal evidence handling, and discreet operations
    
  • Security: Trained in emergency response, patrolling, and public safety
    
• Best For
  
  • PIs: Infidelity, background checks, child custody, missing person
    
  • Security: Events, on-site risk, public spaces
    
• Legal Oversight
  
  • PIs: Must be licensed by the Singapore Police
    
  • Security: Deployed under licensed firms and regulated under different clauses

What Happens During a Private Investigation in Singapore? [Step-by-Step]

First, the private investigator consults with the client to understand the case. Then, a strategy is outlined—often including surveillance, interviews, or digital background checks. Evidence is gathered legally and discreetly. Finally, a detailed report is submitted to the client with findings and recommendations.

How Much Does a Private Investigator Cost in Singapore? [2025 Guide]

Costs vary depending on the complexity and duration of the case. Basic background checks may cost a few hundred dollars, while matrimonial investigations and surveillance can range from $1,000 to $5,000 or more. Be wary of prices that seem too good to be true—they may indicate unlicensed operations.

Final Thoughts

Choosing between a private investigator and security personnel ultimately depends on your goals. If you’re looking to gather evidence, handle confidential matters, or pursue a matrimonial investigation, then working with a trusted private investigation agency in Singapore is your best bet.Security professionals are invaluable for keeping people safe—but if what you need is surveillance, deep-dive intelligence, or investigative services, that’s when you contact us at Baker Street Private Investigator (BSPI). We don’t just investigate—we clarify, advise, and support.