A resume and interview only show what a candidate chooses to present. Reference check questions fill in the gaps by asking people who have actually worked with the candidate about their real performance, behavior and fit. Used well, a reference check is one of the last and most reliable filters before you extend an offer.

Why Reference Checks Matter

A structured reference check helps you:

• See how a candidate actually works with colleagues, managers and clients, not just how they describe it.
• Confirm resume details like employment dates, job title, responsibilities and reason for leaving.
• Understand a candidate’s real strengths and areas for growth from someone who managed or worked alongside them.
• Catch behavioral patterns, such as missed deadlines or conflict with colleagues, before they become your problem.

Reference Check Questions to Ask

• What was [candidate’s name]’s job title and how long did they work with you?
• What were their main responsibilities in that role?
• Why did [candidate’s name] leave the organization?
• Can you describe a project [candidate’s name] worked on and how they performed?
• How did [candidate’s name] respond to feedback or criticism?
• What would you say are [candidate’s name]’s two biggest strengths and two areas to develop?
• How did [candidate’s name] handle stressful or high pressure situations?
• Tell me about a time [candidate’s name] managed a disagreement with a teammate. How did they handle it?
• Would you hire [candidate’s name] again if you had the opportunity?
• Were there any performance or behavior issues we should be aware of, such as missed deadlines or conflict with coworkers?
• Do you think [candidate’s name] is ready to take on more responsibility? Why or why not?

How to Conduct a Reference Check

• Choose questions based on the reference’s relationship to the candidate. A former manager can speak to performance, while a peer can speak to collaboration.
• Run the check as a short call rather than a long form email when possible, so you can ask natural follow up questions.
• Tell candidates in advance that you will be checking references, and ask them to provide the right contacts for the role.
• Ask the same core questions for every finalist so you can compare answers fairly.
• Save reference checks for the final stage, after you already have a strong signal from interviews and any skill assessments.

Reference Check Red Flags

• Discrepancies in factual details. Small date errors are common, but inconsistencies about salary, title or reason for leaving are worth a closer look.
• Vague or generic answers. A genuine reference can usually give specific examples. A lack of detail or enthusiasm can be a signal.
• Any direct negative comment about performance or conduct, even a single one, since most references are chosen because they will speak positively.

Common Challenges During Reference Checks

• Time constraints: keep the call short and focused, or offer an email option for busy references.
• Bias in either direction: some references may be unfairly critical or overly generous. Asking for specific examples rather than general opinions reduces this bias.
• Reluctance to share details: some references are cautious about liability. Reassuring them the conversation is confidential and used only to understand the candidate’s fit can help.

Frequently Asked Questions

What questions should I ask during a reference check?
Cover job title and dates, key responsibilities, strengths and areas to develop, how the candidate handled pressure or conflict, and whether the reference would hire them again.

How many reference checks should I conduct per candidate?
Two to three references, ideally including at least one direct manager, gives a reliable picture without slowing down your hiring timeline.

When should reference checks happen in the hiring process?
Run them at the final stage, after interviews and any skill assessments, so you are only checking references for your top candidate or two.

What is a red flag during a reference check?
Vague answers with no specific examples, discrepancies in basic facts, or any direct negative comment about performance or conduct are all worth investigating further.

Make Reference Checks Part of a Complete Hiring Process

Reference check questions confirm what you have already learned about a candidate, but they work best alongside structured interviews and skill assessments earlier in the process. Glider AI’s skill assessment tools help you validate ability before you get to the reference stage, so the final check is confirmation rather than guesswork.