What Legal Rights Apply During an Employee Theft Investigation?

By awareretailgroup.com Editorial· Edited by Tom Walsh· Published 2026-10-04

When can a retailer ask an employee to take a polygraph?

Under the federal Employee Polygraph Protection Act regulation, a retailer may request a polygraph only when investigating a specific economic loss and the employer can show a particular employee is reasonably suspected of involvement in it (29 CFR 801.12). The regulation says routine inventory or cash register shortages do not meet the economic loss or injury requirement.

The regulation also states that frequent inventory shortages in a warehouse would not be a sufficient basis, standing alone, for administering a polygraph test. It also warns that testing over unspecified, statistical inventory shortages, without identification of a specific incident or activity, would amount to little more than a fishing expedition and is prohibited by the Act.

Access alone is not enough either. The federal rule states that access in the sense of possible or potential opportunity, standing alone, does not constitute a basis for reasonable suspicion.

What must the employer document before a federal polygraph request?

The regulation defines reasonable suspicion as an observable, articulable basis in fact which indicates that a particular employee was involved in, or responsible for, an economic loss. The employer carries the burden: the employer has the burden of establishing that the specific individual or individuals to be tested are “reasonably suspected” of involvement in the specific economic loss or injury.

The regulation gives a negative example. An employer’s assertion that an expensive watch was stolen, and that the employee had access to the watch and is therefore a suspect, would not meet the “with particularity” criterion.

In Cummings v. Washington Mutual, the Eleventh Circuit reasoned that the facts gave the bank reason to believe that Plaintiff was actually capitalizing on that opportunity. The Eleventh Circuit also held that employers need not have conclusive evidence of a violation before requesting a polygraph test, only additional evidence.

The pre-test statement has its own rules. It must be received by the employee at least 48 hours, excluding weekend days and holidays, prior to the time of the examination. It must show the time and date of receipt by the employee and be verified by the employee’s signature. The employer keeps that record for at least 3 years and makes it available for inspection by the Wage and Hour Division on request.

• Write the specific loss in enough detail that it is not an unspecified shortage, such as the item and the incident.
• List the facts that point to each person tested, since access alone is not enough under the regulation.
• Confirm the test is not being used to find out whether any theft occurred.
• Deliver the pre-test statement at least 48 hours before the examination, excluding weekend days and holidays, and have the employee sign it with the time and date of receipt.
• File the statement and proof of service where it can be produced for at least three years.

How do federal, California and Massachusetts polygraph rules differ?

The regulation notes that administration of such tests is also subject to State or local laws, or collective bargaining agreements, which may either prohibit lie detector tests, or contain more restrictive provisions. The three texts reviewed for this article, the federal rule, California’s labor code, and Massachusetts’s statute, differ in what they bar.

California’s labor code provides that no employer shall demand or require any applicant for employment or prospective employment or any employee to submit to or take a polygraph, lie detector or similar test or examination as a condition of employment or continued employment. An employer that requests or administers a test must first advise the person in writing at the time the test is to be administered of the rights guaranteed by this section.

Massachusetts makes it unlawful for an employer to subject such person to, or request such person to take a lie detector test. Under the same statute, no waiver of the provisions of this section by an employee or prospective employee shall be a defense to either criminal prosecution or civil liability.

A multistate retailer cannot run one national polygraph policy. This article reviewed federal, California and Massachusetts text only, so other states and local rules need their own check, ideally with counsel, before any request goes out.

What happens when a union employee asks for a representative?

The Weingarten right was recognized in a Supreme Court case. In NLRB v. J. Weingarten, Inc., the employee asked for but was denied the presence at the interview of her union representative.

The right has limits. The Supreme Court held that the right arises only in situations where the employee requests representation. The NLRB adds that employers are not required to advise employees of their right to representation, and that an employee may not request a private attorney or a family member as their Weingarten representative if that individual has no affiliation with the employee’s union.

Once a request arrives, the employer may grant the employee’s request and delay the interview until a representative is available. With the representative in the room, the employer still sets the purpose: the Court said it may insist that it is only interested, at that time, in hearing the employee’s own account of the matter under investigation. The union representative cannot script answers: a union representative may not tell an employee what to say and may not advise employees to give false answers.

Refusing the request and continuing the interview is the option to avoid. The NLRB says employers violate the NLRA if they proceed with an investigatory interview while refusing an employee’s request or retaliate against them for making the request.

Non-union employees are not covered under current Board law. The NLRB page states that under current Board law, only union-represented employees have this right. Write the pause rule for union-represented staff, and have counsel confirm the Board’s current position before extending the rule to anyone else.

How should the interview open?

Start every theft interview as a fact-finder: open with the documented loss and hear the employee’s account before drawing conclusions.

• Check whether the employee is union-represented before scheduling, since current NLRB law gives the right only to represented employees.
• Open with the documented loss and let the employee give their account first.
• Write down what the employee said, in their words, before drawing any conclusion; the report-writing training guide covers documentation habits.
• Leave polygraph requests out of the interview unless every federal and state condition is met.

What to do this week

• List the states where you operate. The federal rule applies in all of them; mark which are covered by the California or Massachusetts statutes reviewed here, and which still need a state check.
• Find out which locations have union-represented staff, and decide who will pause an interview if a representative is requested.
• Compare your current program with the employee theft awareness training guide to see where interview and polygraph procedures belong.
• Check that hiring follows the same discipline: see FCRA background check compliance.