Blacklisting (Employment)

Blacklisting in retaliation for any of these activities is itself a separate retaliation violation, with damages including back pay, front pay, compensatory damages, and attorneys’ fees.

Blacklisting (Employment) in employment is the practice of preventing or attempting to prevent a former employee from obtaining new employment, typically through negative references, do-not-hire lists circulated to other employers, or coordinated industry communications. Illegal in most US states and prohibited by the NLRA, Title VII, ADEA, and ADA. Also called: blackballing, do-not-hire listing.

What blacklisting looks like in practice

Blacklisting takes multiple forms, ranging from explicit (formal lists shared between employers) to subtle (warning calls between hiring managers in the same industry). Common patterns:

• Formal do-not-hire lists. Internal HR or recruiting databases flagging former employees as ineligible for rehire. Legitimate when based on documented performance or conduct issues; illegal when based on protected activity or retaliation.
• Industry coordination. Hiring managers in the same industry sharing names of ‘difficult’ former employees through professional networks. Often violates antitrust law and state blacklisting statutes.
• Negative or false references. Former employer provides knowingly false or maliciously framed reference information to prospective employers. May constitute defamation, tortious interference, or retaliation.
• Refusing to confirm employment. Deliberately failing to confirm even basic employment dates and titles, signalling to the prospective employer that something is wrong.
• Discouraging hire via informal communication. ‘Off-the-record’ calls between hiring managers warning against a candidate.

The legal frameworks that make blacklisting illegal

National labor relations act (NLRA)

Section 8(a)(3) of the NLRA makes it an unfair labor practice for an employer to discriminate against employees for engaging in protected concerted activity – union organising, collective bargaining, group complaints about wages or working conditions. Blacklisting a former employee for these activities triggers NLRB enforcement, with remedies including reinstatement, back pay, and posted notices.

Title vii, ADEA, ADA – anti-retaliation

Federal anti-discrimination statutes prohibit retaliation against employees for protected activity – filing EEOC charges, participating in investigations, opposing discriminatory practices. Blacklisting in retaliation for any of these activities is itself a separate retaliation violation, with damages including back pay, front pay, compensatory damages, and attorneys’ fees.

Defamation (state common law)

Communicating false statements of fact about a former employee that damage their reputation and employment prospects supports a defamation claim. Most states recognise a ‘qualified privilege’ for honest, good-faith reference communications, but the privilege does not extend to knowingly false statements, statements made with reckless disregard for truth, or statements made with malice.

Tortious interference with prospective economic advantage

Even where statements are technically true, deliberate interference with a former employee’s prospective employment can support a tortious-interference claim in most states.

State anti-blacklisting statutes

Roughly two dozen US states have specific anti-blacklisting statutes – including California (Labor Code §§ 1050-1054), Indiana, Colorado, Massachusetts, Minnesota, Nevada, New Mexico, North Dakota, Oklahoma, Texas, Virginia, Washington, Wisconsin, and others. California makes blacklisting a misdemeanour and provides civil remedies including treble damages.

Antitrust (sherman act)

Where multiple employers coordinate not to hire specific individuals or categories of workers, the practice can implicate antitrust law. The Department of Justice has taken the position that ‘no-poach’ and wage-fixing agreements between employers can be criminally prosecuted as per-se Sherman Act violations.

State-by-state landscape

Employer best practice: how to handle references and post-employment communications

Most US blacklisting exposure arises from poorly-handled day-to-day reference practices. The following best practices reduce exposure materially:

1. Adopt a name-rank-and-serial-number reference policy. Confirm employment dates and last-held title only. Do not confirm performance, eligibility for rehire, or reason for separation through informal channels.

1. Centralise reference responses through HR. Train managers that reference inquiries must be routed to HR. Manager-level off-the-record references are the highest-risk source of defamation and tortious interference claims.
2. Document reference responses. Where HR does provide a substantive reference, document what was said, when, and to whom.
3. Apply truth and good faith. Where a substantive reference is given, ensure the statements are accurate, supported by documentation, and communicated without malice.
4. Distinguish ‘eligible for rehire’ decisions from external references. Internal ‘do not rehire’ flags are legitimate when documented and based on lawful reasons.
5. Audit DNR (do-not-rehire) flags periodically. Periodic review by HR ensures DNR flags are still supported and that the flag is not associated disproportionately with protected classes.
6. Avoid industry-coordination conversations. Discussions with hiring managers at other companies about specific named former employees are risky.
7. Severance and release language. Where severance is provided, include mutual non-disparagement and the company’s defined reference language.

For post-separation dispute resolution, see alternative dispute resolution. For the separation process itself, see exit interview. For the at-will employment context of termination, see that entry.

Signs of being blacklisted (employee perspective)

• Sudden pattern of rejection after late-stage interviews. Multiple offers withdrawn after reference-check stage suggests something is being communicated.
• Confidential tips from prospective employers. Hiring manager or recruiter mentioning ‘concerns we heard’ about the candidate.
• Negative information surfacing in consumer reports. Investigative consumer reports under the FCRA must be disclosed to the candidate.

What to do if you suspect blacklisting (employee side)

1. Document the pattern. Specific roles applied for, dates, reasons given for rejection, names of prospective hiring contacts.

1. Request the consumer report. Under the Fair Credit Reporting Act, applicants are entitled to copies of investigative consumer reports.
2. Conduct reference checks on yourself. Use a paid reference-checking service to call your former employer as if you were a prospective employer.
3. Consult an employment attorney. Blacklisting claims are fact-intensive and state-specific.
4. Consider EEOC and NLRB filings. Where the blacklisting relates to protected activity, EEOC or NLRB charges may produce remedies without civil litigation.

Frequently asked questions