How to prevent impostors in video interviews?

Hiring has changed a lot with video interviews, but so have the tricks candidates use. The Society for Human Resource Management (SHRM) has reported a sharp rise in fraudulent job applicants.

Some impostors show up with fake IDs, some bring in stand-ins, and others even try deepfake filters to fool recruiters.

Catching and preventing impostors in video interviews is now a must. It protects your team from bad hires, saves time and money, and keeps the process fair for real candidates. In this guide, we’ll walk through the red flags and tools that make interviews safer.

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What does “impostors in video interviews” mean?

An impostor in a video interview is someone pretending to be the real candidate. Instead of showing up as themselves, they resort to tricks or rely on others to pass the interview.

This can happen in different ways:

• Proxy interviews: a stand-in answers questions on behalf of the real applicant.
  
• Hidden help: the candidate listens to answers fed through a headset or a second device.
  
• Fake documents: forged IDs or certificates are shown to support a false identity.
  
• Deepfake or AI filters: candidates use technology to alter an individual’s appearance or voice, so the recruiter sees and hears a different person.

The rise of remote-first hiring has made these tactics easier. Organized groups even sell “interview faking services” to job seekers. 

The FBI has warned that deepfakes and stolen IDs are being used in job applications, and Gartner predicts that by 2028, one in four candidate profiles could be fake.

HR departments are now on the front lines of filtering out fraudsters during virtual interviews. – Abhishek Shah, Founder, Testlify

What risks do impostors create for employers?

Impostors in video interviews cause more than just inconvenience. They can expose companies to costly and sometimes serious risks.

1. Bad hires and wasted resources

If a fake candidate makes it through the online assessment, the employer ends up with someone who lacks the real skills. This leads to poor performance, lower productivity, and the need to restart the hiring process.

2. Security and insider threats

Impostors may gain access to sensitive data, systems, or customer information. The FBI (2022) reported cases where deepfakes and stolen IDs were used to land remote jobs, raising the risk of insider fraud and data leaks.

3. Compliance and legal exposure

In regulated industries like finance, healthcare, or higher education, hiring an impostor can lead to compliance violations. 

Employers may breach GDPR or FERPA rules if identity checks are weak, or even face sanctions violations if fake candidates are tied to restricted entities (as seen in the DOJ’s 2023 warning about North Korean IT workers).

4. Team disruption and loss of trust

When an unqualified hire is exposed, it affects team morale and damages trust in the hiring process. Managers and colleagues lose confidence if they feel the screening process is flawed.

How can interviewers spot impostors in real time?

Technology is useful, but a careful interviewer can often detect impostors by watching for small details. Many red flags show up during a live call if you know what to look for.

Camera and visibility

Candidates who avoid turning on their camera, sit in poor lighting, or keep their face partially hidden may be trying to conceal their identity. If visibility is always an issue despite a good connection, it should raise concern.

Eye movement and body language

Constantly looking away from the screen can mean the person is reading notes or receiving outside help. Fidgeting, nervous gestures, or unusually stiff posture may also signal that someone is following prompts rather than speaking naturally.

Delays and rehearsed responses

Pauses before every answer or overly polished replies can suggest the candidate is waiting for instructions or reading a script. Real candidates usually show some variation in tone and thinking.

Audio and video mismatches

If lip movement does not match speech, or if the voice sounds filtered, it could be a sign of manipulation. Even small glitches, like delayed speech or odd cadence, may reveal a deepfake. 

In fact, Fortune found that 17% of U.S. hiring managers have already encountered candidates using deepfake technology to alter their video interviews. This shows the problem is not just theoretical; it’s happening in real hiring processes.

Headsets and unusual pauses

While using a headset is normal, combined with frequent stops, it may suggest that someone else is feeding answers in real time. Interviewers should pay attention to unnatural pauses that break the flow of conversation.

Resistance to verification

Impostors often resist small identity checks. If a candidate refuses to adjust the camera angle, show their surroundings, or hold up an ID when asked, this is a strong warning sign.

Weak personal details

Simple role-based or situational questions often reveal impostors. For example: “Who did you report to in your last job?” or “What tool did you use daily to track progress?” Genuine candidates answer these naturally, while impostors struggle.

Spotting impostors relies on noticing small inconsistencies. Asking for simple adjustments, paying attention to eye contact and voice patterns, and testing for real-life experience can expose candidates who are not genuine.

What tools and protocols help prevent impersonation?

There’s no single fix for impostors in video interviews. But if you use the right mix of tools and a clear process, it becomes very hard for a fake candidate to get through.

Identity verification tools

Before or during an interview, employers can confirm the candidate’s identity with document checks and liveness detection. These tools compare a photo ID with a live camera feed and ensure the person is real, not a recording or manipulated image.

With Testlify, this step is built right into the workflow. Candidates are asked to confirm their identity before they start any test, so there’s no gap between assessment and verification. 

Because assessments, proctoring, and ID checks are all centralized, recruiters don’t have to juggle different tools. It keeps the process smooth for both the hiring team and the candidate.

AI-powered monitoring

Modern platforms use AI interviews to flag unusual patterns during interviews. This includes lip-sync mismatches, sudden audio glitches, or signs that someone else is helping off-screen. These checks run in the background so interviewers can focus on the conversation.

Secure proctoring features

Proctoring used to be something people only connected with exams. But in hiring, the risks are very similar. 

A candidate might try to use a second device, get answers from someone else, or even run another screen in the background. That’s why proctoring has become just as important in interviews as it is in tests.

Here’s how it works:

• Live environment scans shows both the candidate and their surroundings, making it harder for anyone off-camera to feed answers.
  
• Full-screen enforcement keeps the focus on the interview window and blocks candidates from opening other apps or browsers.
  
• Copy-paste blocking stops them from pulling in pre-written answers.
  
• Optional screen sharing lets interviewers confirm what’s happening on the candidate’s device in real time.

With Testlify, all of this is built into the same workflow as the interview. That means you don’t have to switch between tools or ask candidates to install extra software. 

When a candidate joins, the proctoring features run quietly in the background while you conduct the interview.

Explore More: What is AI-powered proctored?

Structured interview protocols

A structured interview makes it harder for impostors to fake their way through. Employers should always include at least one live video round, mix in role-specific or unscripted questions, and ask candidates to perform short skill tasks on camera. 

These steps quickly show whether someone has real experience or is just repeating prompts.

With Testlify, you can take this further. Its AI video interview feature lets you add tailored video or audio questions into the assessment flow. This means you will get to see how they explain ideas, how confident they sound, and how clearly they communicate. 

This combination of structure, live checks, and AI-powered video responses makes it much harder for impostors to hide and gives hiring teams a more complete view of the candidate.

Testlify brings many of these safeguards into one platform. You can run AI-powered video and audio interviews, backed by built-in proctoring features like dual camera, tab tracking, and screen-share. 

With a 3,000+ test library and GDPR/FERPA alignment, it helps teams confirm skills and identity in a secure, fair way.

Conclusion: Building trust in virtual hiring

Impostors in video interviews are a growing challenge, but they don’t have to weaken the hiring process. When companies rely on both people and technology, it becomes easier to separate genuine candidates from fraud.

The goal is to make them fair. Identity checks, careful proctoring, and structured video rounds help protect teams from bad hires while giving honest applicants the space to shine.

With platforms like Testlify, these steps don’t feel like extra work. Assessments, video interviews, and proctoring happen in the same workflow, so hiring stays smooth and secure.