Your top salesperson resigned on Friday and started at a competitor on Monday. Customer calls came in over the weekend. On Monday morning, you discovered that significant downloads occurred from the salesperson’s company laptop in the days before resignation, customer contact lists, pricing information, proposal templates, and confidential business plans. The salesperson did not return the laptop until pressed, and even then the device had been wiped.
This pattern is one of the most common scenarios that brings clients to a business litigation firm. The action window is short. The difference between a fast response and a delayed one often determines whether the customer relationships and confidential information can be protected at all. The sections below walk through what is happening legally, when a customer list is actually a trade secret, what to do in the first days, and how these cases are fought from both sides.
What is happening legally
When an employee takes customer lists or other confidential information on the way out, several legal theories typically apply:
Trade secret misappropriation. If the customer list and related information qualify as trade secrets under TUTSA, the employee’s acquisition and use is misappropriation. See Trade Secret Misappropriation Under TUTSA.
Breach of fiduciary duty. Even without specific contracts, employees owe a duty of loyalty during employment that prohibits preparing to compete in ways that misuse company information. The duty can extend post-employment for specific protectable information.
Breach of contract. Confidentiality agreements, non-solicitation provisions, non-compete provisions, and other restrictive covenants all may apply depending on what the employee signed.
Tortious interference. Against the new employer who knowingly induced or facilitated the misappropriation. See Tortious Interference with Contract.
Conversion and TTLA. When the employee took specific company property (devices, files, materials) or when the conduct meets Penal Code theft elements.
The plaintiff’s strongest cases combine multiple theories. Each theory has its own elements and remedies; the combined pleading provides backup positions if elements of any single theory are contested.
Customer lists as trade secrets
The threshold question in most of these cases is whether the customer list qualifies as a trade secret under TUTSA.
What supports trade secret status:
Substantial investment. The list was compiled through significant investment of time, money, and effort, including sales activity, market research, and relationship development.
Customer details beyond basic contact information. The list includes pricing history, decision-maker information, buying patterns, customer preferences, and similar specifics that have independent economic value.
Reasonable protective measures. Access was restricted, confidentiality agreements were in place, the list was marked as confidential, and other protective measures applied.
What undermines trade secret status:
Publicly available information. Customer names easily obtainable from public sources do not gain trade secret status simply by being compiled.
Inadequate protection. The company did not restrict access, did not require confidentiality, did not mark the list as confidential, or otherwise treated it as ordinary business information.
Obvious industry knowledge. In some industries, the universe of potential customers is known to all market participants and does not have the independent economic value secrecy provides.
The cases that have the strongest trade secret claims involve genuinely confidential customer information protected through reasonable measures. Cases involving thinly protected lists in industries with publicly known customer bases face uphill battles on the trade secret theory.
Immediate response steps
When a departure of this kind occurs, certain immediate steps preserve options:
Secure the employee’s company devices, accounts, and materials. Disable email and system access. Secure the laptop, phone, and any other devices. Preserve forensic images before anyone alters the contents.
Document what the employee accessed. Pull access logs, download records, and other forensic evidence showing what was taken in the period before departure. Cooperation from IT and where appropriate from outside forensic firms is critical at this stage.
Identify what is missing. Catalog the specific information, files, and materials that should be on the devices but are missing or have been deleted.
Send a demand letter. To the former employee and to the new employer. The letter should identify the specific obligations being asserted, demand return of materials, demand cessation of use, and warn of imminent litigation. The letter creates a record and sometimes produces compliance without further litigation.
Engage counsel. The window for effective response is short. Counsel can coordinate the immediate steps and prepare for litigation if necessary.
When litigation is required
If the response to the demand letter is inadequate, or if the underlying conduct shows ongoing use of the trade secrets, litigation becomes necessary. Effective trade secret litigation in this context typically involves:
Filing the lawsuit and TRO application simultaneously. Waiting to file the lawsuit and then later applying for a TRO loses time. Filing both at once allows the TRO hearing to proceed quickly. See TROs in Business Cases.
Pleading multiple theories. TUTSA, DTSA, breach of any applicable contracts, tortious interference against the new employer, conversion or TTLA where applicable.
Including the new employer as a defendant. The new employer’s involvement is usually documented (offers, hiring decisions, deployment of the departed employee), and the new employer’s deeper pockets and reputational concerns often drive settlement.
Comprehensive discovery requests. Aimed at developing the record of misappropriation, the new employer’s knowledge, and the use of the misappropriated information.
Preservation of forensic evidence. Court-ordered preservation of devices, emails, and other electronic evidence prevents destruction during the litigation.
Defending these cases
For employees facing these claims and for new employers being sued:
Attack the trade secret status. Whether the information actually qualifies as a trade secret is often the central contested issue. Public availability, inadequate protective measures, and lack of independent economic value are common defenses.
Develop the legitimate-competition narrative. Texas allows employees to leave for competitive employers and to compete within legitimate bounds. Distinguishing the use of personal knowledge and skills (not actionable) from the use of trade secrets (actionable) is a key defensive task.
Document the new employer’s protective measures. New employers can establish that they instructed the new employee not to use confidential information, segregated the employee from sensitive areas, and otherwise prevented misappropriation.
Examine the employer’s protective practices. Many trade secret claims fail because the plaintiff’s own protective practices were inadequate. Aggressive defense can sometimes produce summary judgment on this basis.
Consider TCPA exposure. Depending on the case theory and allegations, the Texas Citizens Participation Act may provide expedited dismissal options. See TCPA / Anti-SLAPP Business Litigation.
The first week decides the rest
We respond fast, because the first week after a known departure is critical and engaging counsel immediately opens protective steps that later action cannot. We bring in forensic resources early, since most of these cases turn on the electronic record of what was accessed, downloaded, copied, and used, and developing that record is the priority work. We pursue multiple theories rather than one: trade secret claims sit at the center, but adding contract, tortious interference, and conversion claims produces a stronger position than any single-theory case. And we draw on experience from both sides of these disputes, which sharpens both the case we build and the honest risk assessment we give.
Whether the company can protect anything here usually comes down to how the laptop and the access logs were handled in the first few days, often before the company has admitted to itself that this is litigation.
Frequently Asked Questions
Is a customer list a trade secret in Texas?
Often yes. Customer lists qualify as trade secrets under TUTSA when they have independent economic value from not being generally known and are protected through reasonable secrecy measures. A list compiled through substantial investment of time and resources, containing customer relationship details that competitors would value, and protected through confidentiality agreements and access controls typically qualifies. Publicly available directories or lists of obvious customers in the industry generally do not.
What can my company do when a departing employee takes our customer list?
Several immediate steps. Preserve evidence by securing the employee's company devices, email accounts, and other materials. Document what the employee accessed in the period before departure. Send a demand letter to the employee and new employer notifying them of the obligation to return materials and refrain from use. Where the taking is clear and use is imminent, file suit seeking temporary restraining order. The action window is short, taking these steps within days rather than weeks is essential.
What if the employee has no non-compete or non-solicitation agreement?
Trade secret claims may still apply even without restrictive covenants. Texas common-law fiduciary duty and the duty of loyalty during employment can support claims based on the employee's misuse of company information. Tortious interference claims against the new employer who knowingly induced or facilitated the breach can also apply. The absence of a non-compete narrows the legal toolkit but does not eliminate it when the conduct involved misappropriation of confidential information.
Can the new employer be held liable for hiring an employee with our customer list?
Yes, in appropriate cases. Tortious interference with contract claims reach the new employer who knew about the restrictions or about the misappropriation and proceeded anyway. Trade secret claims under TUTSA and DTSA reach the new employer if it knowingly used or facilitated use of trade secrets acquired through the departing employee. The combined exposure to both the employee and the new employer creates meaningful settlement leverage in well-developed cases.
How fast must I act when an employee leaves with confidential information?
Very fast. The window between departure and irreversible competitive harm is often short, sometimes days. Customer contacts can be made and relationships flipped quickly. Evidence on the employee's devices can be destroyed. The new employer can implement protective measures that frustrate later discovery. Counsel should be engaged immediately upon learning of the departure, with evidence preservation and demand letters issued within days, and litigation filing prepared if the response is inadequate.