To prove solicitation of employees, you need two things working together: a legal theory that fits your facts, and evidence that the former employee actively recruited your staff rather than simply announced a new job. The strongest cases rest on a signed non-solicitation agreement, but tortious interference and trade secret misappropriation claims can succeed without one when the conduct supports them. Winning almost always comes down to showing the former employee crossed the line from passively broadcasting their new role to deliberately targeting specific people on your team.
Start With the Legal Theory, Not the Evidence
The theory you plead dictates what you have to prove, which dictates what evidence matters. Collecting the wrong facts because you haven’t settled on a theory is one of the most common ways these cases stall.
Breach of a Non-Solicitation Agreement
If your former employee signed a non-solicitation agreement, this is the cleanest path. Your case turns on two questions: is the agreement enforceable, and did the former employee violate it. Courts assess enforceability on duration (six months to two years is the standard band, though industry and seniority shift the analysis), scope (narrow enough to protect a real business interest without functioning as a career ban), and consideration (something of value given in exchange for the signature).
A few states refuse to enforce non-solicitation clauses aimed at recruiting employees, treating them like non-competes that restrict the right to work. If your former employee sits in one of those jurisdictions, you likely need a different theory. Some courts will trim an overbroad clause down to something enforceable; others take an all-or-nothing view and void the whole agreement. Which rule applies where you’re filing matters before you draft the complaint.
Tortious Interference With Employment Relationships
Without an agreement, tortious interference is the standard fallback. The elements vary by jurisdiction, but you generally must show a valid employment relationship existed, the former employee knew about it, they intentionally interfered, the interference lacked a legitimate business justification, and you suffered actual damages.
This is a harder claim than breach of contract because you’re not just showing someone broke a promise. You’re showing their conduct was wrongful. Offering someone a better job is competitive behavior, not tortious interference. You need proof of something more: using confidential salary data to structure targeted offers, spreading false statements about your company to push people out the door, or systematically going after employees who hold proprietary knowledge.
Trade Secret Misappropriation
When the solicitation ran on confidential information, the federal Defend Trade Secrets Act opens a separate route. If the former employee used protected material like internal salary structures, organizational charts, performance data, or client lists to pick out and pursue your best people, that can be trade secret misappropriation. Remedies include injunctive relief, actual damages, disgorgement of unjust gains, and, for willful and malicious conduct, up to double damages plus attorney’s fees.1Office of the Law Revision Counsel. 18 USC 1836 – Civil Proceedings The statute has one important limit worth knowing up front: a court cannot enjoin someone from taking a new job. Any restriction has to rest on evidence of actual or threatened misappropriation, not on the fact that the person carries sensitive knowledge in their head.
Direct Evidence: The Communications Themselves
Direct evidence is any communication that explicitly shows solicitation. An email pitching an opening. A text urging someone to “jump ship.” A voicemail describing compensation at the new company. Even a single message can carry the case if it’s clear enough.
The usual sources are emails, text messages, LinkedIn and Slack direct messages, and voicemails. What turns a communication into solicitation is content: an invitation to leave, specifics about a competing opportunity, or encouragement to make a move. “I’m enjoying my new role” reads differently from “We have an opening that pays 30% more and I think you’d be perfect.”
Circumstantial Evidence: Building the Inference
Careful former employees don’t leave clean direct evidence. Circumstantial evidence lets you build an inference from surrounding facts. Phone records showing frequent calls between the former employee and current staff, especially calls clustered in the days before a resignation, tell a story without transcripts. A pattern in which multiple employees resign within weeks of each other and land at the same new employer is rarely random.
Witness statements from employees who were approached but chose to stay are often the most valuable piece. They can describe what was said, when, and how the pitch was framed. Talk to them early. Memories fade, and people become less willing to sit for an interview as time passes.
Where Social Media Fits: Passive Versus Active
Social media has made these cases harder to categorize, and where an online post falls on the passive/active line often decides whether it violates an agreement.
Passive conduct includes updating a title on LinkedIn, announcing a new role, or letting the new employer post about the hire. Courts have also treated general product marketing and public job postings as passive. The reasoning is that these communications broadcast to a network rather than target individuals. In Bankers Life & Casualty Co. v. American Senior Benefits LLC, an Illinois appellate court held that generic LinkedIn connection requests sent to former coworkers were not solicitation, because the invitations discussed neither company and made no suggestion to leave.
Active solicitation looks different. When a former employee uses social media to arrange one-on-one meetings with former colleagues, chat privately about leaving, or send targeted direct messages inviting specific people to join them, courts have found violations. In Mobile Mini, Inc. v. Vevea, a federal court described LinkedIn posts as “not mere status updates” but “blatant sales pitches” aimed at drawing people out of the former employer’s network.
The practical implication for evidence: screenshots need context. A post that reads generic on its own can look targeted once you show the poster’s network is dominated by your current employees, or that the language tracks talking points the former employee had internal access to.
Collecting Evidence Without Creating Counterclaims
Evidence is only useful if you gathered it legally. Sloppy collection gets evidence excluded and hands the other side a counterclaim.
Company-Owned Devices and Accounts
Employers generally can review communications on hardware they own and email systems they provide. Federal law prohibits intercepting electronic communications but recognizes a business use exception for monitoring on employer-provided devices for legitimate purposes, and a provider exception that lets the operator of a communication system access communications on it. Confirm you have an acceptable use policy telling employees that company devices and accounts are monitored before you conduct any review. That policy is what defeats an invasion-of-privacy claim.
Personal devices are different. Even when a solicitation message landed on someone’s personal phone, accessing that phone without consent creates real exposure. Stay on what your company owns and operates.
Interviews With Employees Who Stayed
Formal interviews are one of the most productive evidence tools and one of the easiest to mishandle. Keep them discreet, one-on-one, and focused on facts: what was said, when, on what channel, and by whom. Skip leading questions. Nothing coercive. Document everything in writing right after. A signed statement from the interviewed employee is best, but a detailed contemporaneous memo from the interviewer has evidentiary value on its own.
Forensic Imaging
When you suspect a departing employee wiped communications from a returned laptop or phone, forensic imaging can recover traces that survive ordinary deletion. A qualified third-party examiner creates a mirror copy of the drive and captures metadata showing when files were created, opened, transferred, or deleted. Use an outside expert who can establish chain of custody. Any hint that your company tampered with the device will undermine the evidence.
Courts usually require some threshold showing of improper conduct before ordering forensic examination, so preserving the hardware the moment an employee departs is critical. Reimaged and reissued devices are gone as evidence.
What Isn’t Solicitation: NLRA-Protected Conversations
Not every conversation that looks like solicitation is actionable. The National Labor Relations Act gives employees broad rights to discuss wages, benefits, and working conditions with coworkers. Company rules restricting these conversations, even ones labeled as non-solicitation policies, can violate federal law. Agreements with overbroad provisions requiring employees to waive NLRA rights, including some non-disclosure and non-solicitation clauses, may be unenforceable.2U.S. Department of Labor. Employee Rights Under the NLRA
This matters when the “solicitation” you’re trying to prove is really employees venting to each other about pay or conditions. A former employee telling a current colleague “you’re underpaid and should look around” is arguably protected activity, not actionable recruiting. The line runs between discussing working conditions, which is protected, and actively steering someone to a specific competing employer, which isn’t. Employers with neutral confidentiality rules protecting trade secrets stand on firmer ground than those enforcing broad restrictions on workplace conversation.2U.S. Department of Labor. Employee Rights Under the NLRA
Where These Cases Fall Apart
A few patterns show up again and again when solicitation claims fail.
Waiting too long is the first. Non-solicitation agreements have built-in expiration dates, and courts are less receptive to arguments about irreparable harm when the employer sat on evidence for months. Move fast once you see the problem.
Relying on a poorly drafted agreement is the second. Vague scope, unreasonable duration, or missing consideration can turn a winning fact pattern into a judicial lecture on overbroad restrictions. Not every court will trim the agreement into shape. Some will void it entirely. Have employment counsel review your agreements before someone breaches one, not after.
Confusing normal attrition with solicitation is the third. People leave jobs. Three resignations in a quarter is suspicious, but suspicion isn’t proof. A court needs evidence connecting the departures to specific conduct by the former employee. Filing a weak claim can expose you to attorney’s fees if the other side can show bad faith, so the strength of your evidence should drive the decision to file, not the sting of losing people.