Hiring a full-time nanny is one of the biggest childcare decisions you'll make—and skipping thorough vetting can put your kids at serious risk. The reference and background check process isn't just a formality; it's your primary defense against hiring someone with a hidden history of neglect, theft, or worse. Here's what you actually need to investigate before bringing someone into your home full-time.
Why References Matter More Than You Think
A résumé tells you what a candidate claims to have done. References tell you what they actually did. For full-time nannies, you're looking for people who've spent hundreds of hours caring for other families' children—so previous employers are gold.
Don't accept vague endorsements. Contact at least two previous families the nanny worked for directly, and ask specific questions: How long did they employ her? Did she handle emergencies well? Were there any behavioral concerns with the children? Did she follow instructions? Would they rehire her? A genuinely satisfied employer will give you concrete examples; someone scrambling for answers is a red flag.
Request references from families where she worked for at least one year. Short stints (3–6 months) are concerning unless there's a clear reason like the family moving. Full-time nannies who jump jobs frequently may indicate turnover issues tied to performance or reliability.
Critical Background Check Elements
A comprehensive background check for a live-in or full-time nanny should include:
- Criminal history (7–10 years minimum, preferably national)
- Sex offender registry verification
- Child abuse and neglect records (state-specific databases)
- Driving record (if she'll transport your kids)
- Employment history verification (confirm dates worked)
- Education credentials (CPR/First Aid certifications)
Most background checks cost $30–$100 per candidate. Services like Care.com, Care Indeed, or Bambino offer built-in screening, though Mercoly also helps you compare vetted full-time nanny providers in one place to streamline this process.
Never skip this step. Background checks sometimes reveal arrests or convictions a candidate "forgot" to mention—and what they don't tell you matters as much as what they do.
Red Flags During the Reference Check
Watch for these warning signs when speaking with previous employers:
- Hesitation or vagueness when asked direct questions
- Reluctance to discuss specific incidents (discipline approaches, safety concerns)
- Short tenure explanations that don't quite add up
- Lukewarm recommendations ("She was fine") instead of enthusiastic endorsements
- Unwillingness to be contacted or difficulty reaching references
- References who only communicate via text or email (insist on a phone call)
If a previous employer seems guarded or uncomfortable, trust that instinct. They may have legal concerns about what they can say, but their body language is telling.
Gaps and Inconsistencies to Question
Review the nanny's employment timeline closely. Large unexplained gaps raise questions—was she between jobs, dealing with a personal situation, or something else? Ask about them directly. Similarly, if her stated reasons for leaving previous positions don't align with what references tell you, dig deeper.
Inconsistencies in the story are often the first crack. Someone who says she left a job due to relocation but her reference says the family let her go has credibility issues.
Certifications and Training Verification
Full-time nannies should have current CPR and First Aid certification from organizations like the American Red Cross. Verify these directly with the issuing organization—don't just accept a certificate. Some nannies exaggerate or use expired credentials.
Ask about additional training: infant care, special needs experience, or child development coursework. These aren't deal-breakers if missing, but they show commitment to the role.
Trust Your Gut, But Document Everything
After references and background checks, you'll interview in person. Pay attention to how the nanny interacts with your kids, how she answers questions about discipline and routines, and whether her values align with yours. But documentation matters: keep notes on all reference conversations, background check results, and interview impressions.
Frequently Asked Questions
Q: How long should a background check take? Most comprehensive background checks for nannies return results within 5–7 business days, though some can take up to two weeks depending on the scope and state records access.
Q: Can I use a nanny agency to skip doing my own reference checks? No—agencies conduct basic screening, but they're not liable for negligent hiring. You should always independently verify references and review background check reports yourself.
Q: What should I do if a reference gives a poor or concerning review? Don't hire that candidate. A bad reference is a disqualification; there are plenty of qualified nannies out there, and your kids' safety comes first.
Use these steps to hire confidently—your family's peace of mind depends on it.