How to spot a proxy interview: warning signs and what to do

A proxy interview is when someone other than the real applicant does the interview, or feeds the applicant answers during it, so the person you hire is not the person you assessed. You spot one by comparing identity signals at every stage: the resume and contact details before the call, the face, voice and behavior during it, and the person who turns up afterward. When you suspect one, document what you saw, re-verify identity on a short live call, and let a second person review the evidence before anyone decides.

It is common enough to plan for. In Checkr's September 2025 survey of 3,000 US managers, 35% said "someone other than the listed applicant has participated in a virtual interview." In a Gartner survey of 3,000 job candidates, as reported by HR Dive, 6% admitted to interview fraud, "either by posing as someone else or having someone else pretend as them."

What does a proxy interview look like?

Proxy interviews come in a few forms, and the warning signs differ for each.

1. The full stand-in. A more qualified person does the whole interview under the applicant's name. The applicant shows up for the job.
2. The hidden helper. The real applicant is on camera, and someone off screen or on another device feeds answers through an earpiece, chat or notes.
3. The lip-sync. The face on camera belongs to the applicant, but the voice belongs to someone else, sometimes with voice-altering software.
4. The switch after hire. The FBI describes this directly in its July 2025 advisory: "Sometimes an individual is employed to pass the initial interview, but the on-the-job work is completed by a different individual."

A fifth variation uses face-swapping or AI-generated video to impersonate someone. We cover that separately in deepfake job candidates.

What are the warning signs before the interview?

Many proxy setups leave traces in the application itself. The FBI's January 2025 advisory recommends cross-checking HR systems "for other applicants with the same resume content and/or contact information," and notes that the same phone numbers, particularly voice-over-IP numbers, and email addresses have been reused across resumes for different applicants.

Before you schedule, check for:

• The same resume text, phone number or email showing up under different names in your ATS
• A LinkedIn or portfolio photo that doesn't match other photos of the candidate, or no photo anywhere
• Contact details that don't line up with social profiles, portfolio sites or payment platforms (a cross-check the FBI's July 2025 advisory recommends)
• Typos and unusual wording in the resume, which the FBI's January 2025 advisory also lists
• Pushback on video, repeated requests to move to audio only, or reasons why the camera can't be on
• Unusual insistence on a specific interview platform, or on times that don't fit the candidate's stated location

None of these proves anything alone. Plenty of honest candidates have thin LinkedIn profiles. What you are looking for is a cluster. Keep the list about identity details that don't match: a candidate's name, accent, country of origin or where they studied is never a warning sign, and treating it as one is national origin discrimination as the EEOC defines it.

What are the warning signs during the interview?

This is where most proxies are noticed, usually because something about the conversation doesn't fit together.

Watch the audio and video together. The FBI's 2022 advisory on deepfakes and stolen identities describes interviews where "the actions and lip movement of the person seen interviewed on-camera do not completely coordinate with the audio of the person speaking," and where coughing or sneezing didn't line up with what was on screen.

Other signs worth watching for:

• A steady delay before every answer, including easy ones like "where did you work before this role?"
• Eyes repeatedly moving to the same spot off screen before answering
• Answers that are fluent on textbook questions and vague on the candidate's own projects
• A voice that sounds different from a previous phone call
• Background murmuring, typing when the candidate isn't typing, or an echo that suggests a second microphone in the room
• Reluctance to show the room, move the camera, or turn their head

Nerves, accents, a slow connection and a noisy home all produce some of the same signals. That is why the response to a suspicious interview is to verify, not to reject on the spot.

A good technique is to ask the candidate to go deeper on something only they would know. "Walk me through the hardest bug on the project you listed at your last job. What did you try first?" A stand-in coached on the resume can usually handle the first question. The third follow-up is harder to fake.

What are the warning signs after the interview?

Proxy fraud often surfaces later, when a different person shows up.

• The candidate at the client interview or on day one looks or sounds different from the screen.
• Their skill level on the job drops sharply below what they showed in interviews.
• They ask to ship the laptop to a different address than the one on their ID. The FBI advises that if an employee "requests delivery to a different address, require additional documentation to verify the address."
• They change bank or payment details soon after starting.

The FBI's July 2025 advisory recommends you "capture images for comparison with future meetings." For an agency, that means keeping a record of who you screened, so you have something to compare against when the client meets the candidate.

Which warning signs matter at each stage?

What should you do if you suspect a proxy interview?

1. Stay neutral on the call. Accusing someone mid-interview rarely helps and can be unfair if you are wrong.
2. Write down what you saw, with times. "At 12 minutes, lip movement stopped matching the audio for about 20 seconds" is useful. "Seemed off" is not.
3. Ask for a short live re-verification: camera on, government ID held up next to the face, a few questions about their own work history.
4. Compare the evidence: recordings, screenshots, ID photo, resume and social profiles.
5. Have a second person review it before deciding. If you are an agency, tell your client what you found and what you checked.
6. If the pattern fits the North Korean IT worker scheme, report it to the FBI at ic3.gov, as the FBI's advisories ask. Our checklist for staffing agencies covers that case.

How Simplehire makes stand-ins harder

Simplehire runs AI voice screening interviews for recruiters. The candidate talks with an AI interviewer in their browser, and you get a screening report before you submit them to a client. Three parts of the product are aimed at proxy interviews.

ID check

On Enterprise, you can set the ID check to Off, Optional or Required. When it is required, the candidate must pass a government ID check and a live face match before the interview begins. It won't catch every fake ID, but it ties the screen to a document and a live face.

Second device

You can require a paired second device. The candidate scans a code with their own phone, with nothing to install and no account, and the phone gives a side-camera view of the candidate, their laptop and the desk around them. A helper sitting just outside the webcam frame is harder to hide from a second angle. Lighting, framing and camera angle are checked before the interview starts, and candidates are told before monitoring begins.

Proctoring alerts

Every tier runs in enforced full-screen mode and records tab switches, focus loss, and copy and paste attempts. On supported Windows interviews, Simplehire Proctor has candidates close risky applications such as remote-desktop tools before the interview starts. Every event is timestamped in the report, interview audio is recorded, and alerts come with screenshots and a severity level from Low to Critical concern. A person reviews every finding. Simplehire raises alerts; the recruiter decides.

Tiers and price

The Adaptive tier ($3 per screen) adds follow-up questions that dig deeper into the candidate's answers, the same idea as the follow-up technique described above. Basic is $2 and Advanced is $5 per screen, and you get 25 free Basic screens every month with no credit card. See the proctoring details or start free.

For the numbers behind all of this, see our candidate fraud statistics. For hidden helpers who use AI tools, see AI cheating in interviews.