TRAP AND TRACE LAW May 29, 2026 14 min read

Delaware Trap and Trace Law: What Pen Register and Trap-and-Trace Orders Mean

“Trap and trace” sounds like a phrase pulled from a crime drama, but the real law is quieter and more technical. It is usually not about listening to a phone call or reading a message. It is about the outside edge of a communication, like looking at the postmark on an envelope instead of opening the letter. That outside edge can still tell a powerful story.

Delaware has a full state rule set for pen registers and trap-and-trace devices in Title 11, Chapter 24, Subchapter III of the Delaware Code. The state does not merely point back to federal law and stop there. It lays out who may apply, which court acts on the request, what the order must say, how long it can last, when a provider must help, and what happens when someone uses one of these devices without a court order.

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What a Trap-and-Trace Device Does

A trap-and-trace device captures incoming identifying information. In phone terms, it can show the number or device from which an incoming communication began. In simple English, it answers one question: who reached in?

A pen register works in the other direction. It records and decodes outgoing identifying information. In phone terms, it can show numbers dialed or transmitted from a line. In simple English, it answers this question: who did this line reach out to?

Both tools deal with communication traffic data, not message content. They may show numbers, direction, time, and certain transmission details. They are not supposed to capture the actual words of a phone call, the body of a text, the words in an email, or the meaning of a chat. They study the tracks in the snow, not the conversation inside the cabin.

Delaware’s Definitions

Delaware defines a pen register as a device that records and decodes electronic or other impulses that identify numbers dialed or otherwise transmitted on the phone line to which the device is attached. The definition excludes ordinary billing, cost accounting, and similar business uses by a provider or customer in the normal course of business.

Delaware defines a trap-and-trace device as a device that captures incoming electronic or other impulses that identify the originating number of an instrument or device from which a wire or electronic communication was sent.

Those definitions have a phone-era feel. They speak about lines, impulses, and numbers. Modern cases may involve phones, online accounts, service providers, and electronic systems. Even with newer systems, the same basic split remains: pen register means outgoing identifying details, and trap-and-trace means incoming identifying details.

The Court That Handles These Orders

For Delaware pen register and trap-and-trace orders, the “court of competent jurisdiction” means the Superior Court of Delaware. That is stated directly in the Delaware Code for this subchapter.

This matters because not every court is the right court for this kind of order. The application goes to the proper Delaware court, and the court decides whether the statutory showing has been made. The order is not something an officer can create by filling out an agency form and sending it to a phone company.

The Superior Court acts as the gate. The gate may open when the law’s conditions are met, but there is still a gate.

Court Order Required

Delaware law says a person may not install or use a pen register or a trap-and-trace device without first getting a court order under Section 2433, unless a provider exception applies. That rule is the center of the subchapter.

A violation is a class A misdemeanor, and the statute sets a fine of not more than $5,000. That penalty makes the warning clear. These tools are not toys for private snooping. A person who installs or uses one without the required order can face criminal trouble.

This is where many people misunderstand the law. A suspicious partner, angry business rival, landlord, roommate, or private investigator cannot decide to trace communications just because they want answers. Curiosity is not a court order.

Provider Exceptions

Delaware gives providers of wire or electronic communication service limited exceptions. A provider may use a pen register or trap-and-trace device for operation, maintenance, testing, protection of the provider’s rights or property, or protection of users from abuse or unlawful use of the service.

A provider may also record the fact that a communication was started or completed to protect itself, another provider helping complete the communication, or a user from fraudulent, unlawful, or abusive service use. The user’s consent can also matter under the exception.

These provider exceptions are built for service health, fraud control, abuse prevention, and network work. They are not a free pass for random spying. A phone company checking fraud patterns is not the same as a private person secretly adding trace software to someone else’s account.

Who May Apply for an Order

In Delaware, an investigative or law-enforcement officer may apply for a pen register or trap-and-trace order, or for an extension of an order. The application must be in writing and must be made under oath or an equivalent affirmation.

The application must identify the officer making the request and the law-enforcement agency conducting the investigation. It must also include a sworn statement that the information likely to be obtained is relevant to an ongoing criminal investigation conducted by that agency.

That relevance standard is lower than probable cause. It does not mean the court has already found that the target committed a crime. It means the law asks for a sworn relevance showing tied to an active criminal investigation.

The Ex Parte Order

If the court finds that the information likely to be obtained is relevant to an ongoing criminal investigation, the court must enter an ex parte order authorizing the installation and use of the pen register or trap-and-trace device within the court’s jurisdiction.

“Ex parte” means the request is handled without the other side present. The subscriber or account user usually does not appear in court before the order is granted. That is part of how these investigative orders work.

This can feel one-sided, but the statute gives the court a gatekeeping role and sets limits on content, time, scope, sealing, and provider help. The order is meant to be narrow, not a floodlight pointed at every corner of a person’s life.

What the Order Must Say

A Delaware order must specify the identity, if known, of the person to whom the electronic communication service is leased or in whose name it is listed. It must also specify the identity, if known, of the person who is the subject of the criminal investigation.

The order must identify the number and, if known, the physical location of the electronic communication service to which the device will be attached. In the case of a trap-and-trace device, the order must include the geographic limits of the trap-and-trace order.

The order must describe the offense to which the information likely to be obtained relates. It may also direct, at the applicant’s request, that a provider, landlord, custodian, or other person furnish information, facilities, and technical help needed to carry out the order.

How Long the Order Can Last

A Delaware pen register or trap-and-trace order may authorize installation and use for no more than 60 days. Extensions may be granted, but each extension must follow the application process and judicial finding required by the statute. An extension may not exceed 60 days.

The 60-day limit is a clock on the wall. It stops one order from running forever. If law enforcement wants more time, it must return to the court and meet the statutory test again.

In a real case, the dates can matter. A lawyer may look at when the order began, when it ended, whether an extension was granted, and whether the data collection stayed inside the approved window.

Sealing and Nondisclosure

A Delaware order must direct that the order be sealed until the court says otherwise. The order must also direct the person who owns or leases the line, or the person ordered to help, not to disclose the existence of the pen register, trap-and-trace device, or investigation to the subscriber or to anyone else unless the court later allows disclosure.

This is why a person may not learn that an order exists while it is active. The provider may be barred from telling the customer. A company employee who receives the order may not be free to answer a customer’s direct question.

For businesses, this means a sealed order should be handled by a small legal response team. It should not be forwarded around the office, discussed with the customer, or treated like a routine support ticket.

Provider, Landlord, and Custodian Assistance

Delaware law allows the court order to require help from a provider of wire or electronic communication service, landlord, custodian, or other person. For a pen register, the helper must provide information, facilities, and technical assistance needed to install the pen register in an unobtrusive way with minimal interference to service.

For a trap-and-trace device, the person or provider may be ordered to install the device on the proper line and provide additional information, facilities, and technical help. Unless the court orders something different, results must be furnished to the named law-enforcement officer at reasonable intervals during regular business hours for the duration of the order.

The statute also says the helper must be paid for reasonable expenses tied to furnishing facilities or technical assistance. That payment rule recognizes that compliance can take staff time and technical work.

Good Faith Defense and Civil Claims

Delaware law protects providers and other specified helpers who act in line with a court order. The statute says it does not create a cause of action against a provider, its officers, employees, agents, or other covered people for providing information, facilities, or assistance according to the terms of a proper order.

It also says good faith reliance on a court order, legislative authorization, or statutory authorization is a complete defense against civil or criminal action under the pen register sections or under any other law.

For a company, that does not mean “send everything.” It means follow the order carefully. Good faith works best when the response is narrow, documented, and tied to the paper the court signed.

How This Differs From a Wiretap

A wiretap or interception order can reach the content of a communication. That means the words spoken, the message text, the email body, or the substance of what people say. Delaware has separate rules for interception of wire, oral, and electronic communications.

A pen register or trap-and-trace device deals with identifying information, not content. It is like reading the outside of a package: name, direction, timing, and route. It is not supposed to open the package.

That difference matters, but it does not make pen-register data harmless. A pattern of numbers, times, and incoming contacts can reveal relationships and habits. A shadow can show the shape of a person even when you cannot see the person clearly.

Stored Records Are Different Too

Delaware also has rules for stored wire and electronic communications and transactional records. That is a separate subchapter. Stored messages, account records, subscriber records, and past logs may fall under different court orders, warrants, subpoenas, or statutory requests.

A pen register or trap-and-trace order is usually forward-looking. It lets the device or process collect data during the time approved by the order. A stored-records request may seek information already held by a provider.

The two can meet in the same investigation, but they are not the same tool. One watches the road going forward. The other may ask for old road maps kept in a file drawer.

What Private People Should Not Do

A private person should not install software, hardware, call forwarding, router rules, hidden apps, or account settings to trace someone else’s communications without clear legal authority. That kind of conduct can lead to criminal, civil, family-court, workplace, or contract trouble.

Do not break into an account to see who is calling or messaging someone. Do not use spyware. Do not pay someone to trace a phone line or online account. Do not plant a device on a phone system, router, vehicle, or computer to gather communication data.

If there is a safety concern, business dispute, custody case, or harassment issue, speak with a Delaware lawyer or law enforcement through lawful channels. A secret trace can turn a victim into a defendant if handled badly.

What Delaware Residents Should Know

For Delaware residents, the practical point is this: law enforcement can ask the Superior Court for an order to collect non-content communication data during an ongoing criminal investigation. The target may not receive notice while the order is active, because the order is sealed and nondisclosure rules apply.

The data may later appear in a criminal case, warrant request, charging paper, or discovery file. It may show outgoing numbers, incoming origins, time patterns, and links between accounts or devices. Even without message content, that data can shape the investigation.

If you learn that a pen register or trap-and-trace order was used in a case involving you, speak with a Delaware criminal defense lawyer. The lawyer can review the application, order, dates, provider results, scope, and whether the collection stayed within the order.

What Businesses Should Do With an Order

A business that receives a Delaware pen register or trap-and-trace order should treat it as a court command. Preserve the order, limit internal access, and get legal review right away.

Read the order closely. Check the court, date, covered line or service, time period, named officer, technical help requested, and nondisclosure language. Provide what the order requires, not extra accounts, extra dates, or extra data outside the order.

Keep a clean internal record of who received the order, who reviewed it, what was provided, and when. A careful response is like a tight knot in rough water. It keeps the line from tangling later.

Common Misunderstandings

One common misunderstanding is that trap and trace means live listening. It does not. It means incoming identifying information, not the words of a call or the content of a message.

Another misunderstanding is that pen-register data has little privacy value. It can still show who contacts whom, when, how often, and in what pattern. A list of contacts can tell a story even when no message is read.

A third misunderstanding is that Delaware leaves everything to federal law. Delaware has its own subchapter for pen registers and trap-and-trace devices. It sets the Superior Court as the court, requires a written sworn application, uses the relevance standard, sets a 60-day limit, and carries a class A misdemeanor penalty for unlawful installation or use.

Bottom Line on Delaware Trap and Trace Law

Delaware trap and trace law sits in Title 11, Chapter 24, Subchapter III. It requires a court order before a person may install or use a pen register or trap-and-trace device unless a provider exception applies. Unlawful installation or use is a class A misdemeanor with a possible fine of up to $5,000.

An investigative or law-enforcement officer may apply to the Delaware Superior Court in writing and under oath. The application must identify the officer and agency and must state that the information likely to be obtained is relevant to an ongoing criminal investigation. If the court finds the standard met, it enters an ex parte order.

The order must identify the service, subscriber or user if known, investigation subject if known, physical location if known, offense, and for a trap-and-trace device, the geographic limits. The order may run no more than 60 days, with 60-day extensions available through the same court process. It must be sealed and must bar disclosure to the subscriber or others unless the court allows it.

A pen register looks outward. A trap-and-trace device looks inward. Neither is meant to capture message content. Still, both can reveal the shape of communication. In Delaware, that shape can matter in criminal cases, privacy disputes, and business compliance. When the issue is real rather than theoretical, get legal advice from a Delaware lawyer who can read the order, the statute, and the facts together.

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