Why Shouldn't You Trust the References a Candidate Gives You?

You shouldn't trust the references a candidate gives you, because the candidate picked them. Every name on that list was chosen for one reason: it will say something good. I'm Christian Saab, founder of CPG Recruitment, and since March 2020 my team has built teams across 25+ industries in Canada and the US. A candidate-supplied reference list isn't a background check. It's a curated highlight reel handed to you by the person being checked. The real information sits one layer deeper, and it takes exactly one extra question on the call to reach it.

Why are candidate-supplied references almost always positive?

Because a candidate would have to be careless to hand you a name that might sink them. Look at what you're actually asking: give me three people who will vouch for you. Any reasonable person answers that by choosing the manager who liked them, the colleague who was a friend, and the client who got the best version of their work. That isn't dishonesty. It's the obvious response to the question you asked.

So the answer you get back is real, but it's incomplete by design. You hear about the project that went well. You don't hear about the eight months before it. And the gap between those two things is exactly where the risk lives — the risk that, uncorrected, turns into the six-figure cost of a bad hire.

What is the one question that turns a reference call into a real check?

Ask the reference: "Who was another manager who worked with them? Can I get their contact?" That's it. That's the whole move. You make the call the candidate expected you to make, you have the pleasant conversation they expected you to have, and then at the end you ask for a name they never nominated.

Most people say yes without hesitating, because in the flow of a friendly call it reads as an administrative question rather than an investigation. They're not protecting anyone. They're just answering. And now you have a phone number that nobody prepped.

Why does the unprompted second reference tell you the truth?

Because nobody rehearsed them. The references on the candidate's list often know the call is coming — sometimes they've been texted the day before and told what the role is. That's normal, and it's why their answers arrive pre-shaped. The second-layer reference got none of that. They have no script, no loyalty obligation, and no idea they were going to be part of this.

What you get instead is an unguarded answer. Sometimes it confirms everything the first reference said, and that's genuinely valuable — two independent sources agreeing is much stronger evidence than one source agreeing with the resume. Sometimes it doesn't confirm it, and you've just avoided a hire that would have cost you a year.

What should you ask the second-layer reference?

Ask about behaviour, not performance. Performance questions get you adjectives — hardworking, reliable, great communicator — and adjectives are worthless because everyone uses the same ones. Behaviour questions get you incidents, and incidents are information.

Ask what the person was like on their worst week. Ask how they handled being told they were wrong. Ask who on the team found them difficult to work with, because somebody always did, and a reference who insists nobody did is a reference who is managing you. Ask whether they'd put this person on their own team again tomorrow, and listen to the pause before the answer more than to the answer.

What does it mean if nobody will give you a second name?

It's a flag, not a verdict. Plenty of legitimate reasons exist: the company has a policy against giving out colleagues' contact details, the team scattered after a restructure, the reference genuinely doesn't remember who else was around. Take those at face value the first time.

What you're watching for is the pattern. If every reference on the list suddenly gets vague at exactly the same question, that's no longer three coincidences. Somebody has been briefed. Across the 25+ industries we've hired for since 2020, I've never once regretted slowing down at that moment, and I've regretted speeding up plenty of times.

Where does reference checking belong in your hiring process?

At the end, as the final gate before an offer — never as a substitute for the work that comes earlier. A reference check confirms or breaks a decision you've already reasoned your way toward. It cannot build that decision for you. If you go into the call without a clear picture of who you're looking for, you'll hear whatever you were hoping to hear, because that's what humans do.

That's why the reference call is the last step in the three steps to hiring the right person, not the first. Define the role, align everyone with a yes or a no, run one consistent process, and only then verify. Running the sequence in that order is a large part of why we cut average time-to-fill from 68 days to 37 — you stop re-opening searches that should never have closed.

Does this mean the candidate's own references are useless?

No, and don't skip them. They're the doorway. You cannot get to the second layer without first calling the first layer, and a friendly, genuine conversation with the reference the candidate chose is what makes the second name easy to ask for. Treat that first call as relationship-building, not interrogation.

The mistake isn't calling the references the candidate supplied. The mistake is stopping there, ticking the box, and telling yourself you did due diligence. You did the part of due diligence the candidate designed for you. Everything past that is the part you designed — and it's a direct test of whether your hiring standards are high enough to survive the pressure of an empty seat.

Frequently Asked Questions

How many references should you actually call?

Three is the working number for most roles: two from the candidate's list and at least one second-layer name you sourced yourself. For a senior or safety-critical role, push it to four or five and make sure at least two are people the candidate never nominated. The count matters far less than the independence of the sources.

Is it acceptable to contact someone the candidate didn't list?

Asking a reference for another colleague's contact is routine practice, but the rules around contacting a current employer, and around what information a former employer can disclose, vary by province, state and industry — so confirm your approach with your own employment counsel. The general courtesy that keeps you safe is simple: tell the candidate you do layered reference checks before you start, and never contact a current employer without their explicit permission.

When in the process should reference checks happen?

After the final interview and before the offer goes out. Running them earlier wastes everybody's goodwill on candidates you won't hire, and running them after a verbal offer means you've already emotionally committed and will rationalize away whatever you hear.

Can a recruitment agency do layered reference checks for you?

Yes, and it's one of the clearest places an agency earns its fee, because a third party asking for a second name is far less awkward than the hiring manager doing it. At CPG Recruitment layered referencing is standard on every placement across the 25+ industries we serve.

If you're about to make a hire and the only references you have are the three the candidate handed you, you don't have a reference check yet — you have a testimonial page. Talk to CPG Recruitment about running the search properly, or get in touch with me directly if you'd rather walk through your current process first. You can also read the CPG Recruitment version of this guide, written for hiring teams building the check into a repeatable process.