Reference checking has a reputation problem, and it is deserved. A candidate nominates two people who like them, a coordinator confirms employment dates, and everyone treats the box as ticked.
The format is not the problem. The questions are.
Where references belong in the process
After the decision is provisionally made, before the offer is final. Two reasons: doing them earlier wastes referee goodwill on candidates you will not hire, and doing them after a signed offer means you will not act on what you learn.
Be explicit with the candidate about the timing and never contact a current employer without permission. Doing so can cost someone their job and will cost you the hire.
Questions that produce signal
The aim is not "was this person good". Everyone says yes. The aim is calibration: how does this person work, and what conditions do they need.
1. What did they own, and what did the team own?
Verifies scope, which is the most commonly inflated element of a CV. Not dishonesty usually — people genuinely absorb team achievements into their own account over time.
2. What did they need from you to do their best work?
The most useful question available. It is not a weakness question, so it is answered honestly, and the answer is directly actionable by the future manager. "She needed the goal to be clear and then to be left alone" tells you how to manage someone.
3. What was the hardest thing they dealt with, and how did it go?
Provides a concrete anchor and often surfaces a situation the candidate did not mention.
4. Where would you not put them?
Softer than asking for weaknesses and yields more. Referees answer this readily because it is framed as fit rather than deficiency.
5. Would you work with them again, and in what capacity?
The second half carries the information. "Yes, absolutely" and "Yes, though not reporting to me" are very different answers.
6. Is there anything I have not asked that I should have?
Always close with this. Referees frequently have something they were waiting to be asked and will not volunteer unprompted.
What you cannot ask
References are subject to the same constraints as interviews, and it is easy to drift in a conversational format.
- Protected characteristics. Age, health, disability, marital or family status, religion, national origin, association membership. Not directly, not indirectly, not as an aside.
- Salary history, where restricted in your jurisdiction — and it is restricted in a growing number.
- Absence records, which frequently reveal health or family information.
- Anything about their personal life.
Two further points that catch people out. Reference notes are personal data about the candidate and may be disclosable to them, so write assessments of evidence rather than impressions. And where you use a third-party provider, they are a processor to be listed in your candidate privacy notice.
Handling the constrained referee
Many organisations restrict what employees may say to dates and title, and many referees are cautious regardless of policy.
Three things help. Say clearly at the start that the candidate has been offered the role pending references — it lowers the perceived stakes. Ask about the work rather than the person, since process questions are answerable within most policies. And listen to hesitation: a referee who declines to answer question four after answering the rest enthusiastically has told you something, and it is worth noting without over-reading.
Back-channel references
Common, particularly in smaller markets, and worth being deliberate about. Contacting someone the candidate did not nominate, without telling them, means acting on information the candidate cannot see or correct — and in a small market, one careless conversation can reach a current employer.
A defensible middle position: ask the candidate whether there is anyone else at their previous employer you may speak to. Most say yes, and you get the wider view with consent intact.
What to do with what you learn
References rarely reverse a hiring decision and should not usually be expected to. Their real value is onboarding: what this person needs from a manager, what to set up in week one, where to give more or less structure.
Pass the useful parts to the hiring manager as onboarding notes rather than filing them as a compliance record. That is where the return is — and it connects directly to what the debrief recorded about how to support the person if hired.