How Long Does a Typical Investigation Take?

How Long Does a Typical Investigation Take?

Short answer: It depends entirely on the type of investigation. A simple address trace can be completed in 24 to 48 hours. A surveillance case usually requires three to five days of observation. Complex fraud or corporate investigations can run for several weeks or months. There is no single timeline because every case starts from a different point and involves different challenges.

Timelines by Investigation Type

People tracing. Straightforward cases where the subject has a normal digital footprint and has not deliberately hidden can be resolved in one to three days. Difficult traces, where the person has moved frequently, changed their name, or lives off the grid, may take one to two weeks. International traces take longer still. Read more about our people tracing work.

Surveillance. Most surveillance operations are planned in blocks of three to five days. A single day of observation can yield useful evidence if the subject’s routine is predictable, but experienced investigators know that behaviour patterns need several days to emerge. Some cases require intermittent surveillance over two to three weeks to capture what the client needs.

Background checks. A basic background check covering public records, company directorships and court judgments can be turned around in two to five working days. Detailed checks involving employment verification, reference checks, international records and financial standing take one to three weeks.

Fraud investigations. Fraud cases are among the most time-consuming because they often involve tracing money, analysing documents, interviewing witnesses and building a case that meets court standards. A simple case might take two to four weeks. Complex fraud involving multiple parties, offshore entities or large sums can take three to six months.

Matrimonial and relationship cases. Cases involving suspected infidelity typically require one to two weeks of surveillance combined with background research. The timeline depends on how quickly the subject’s behaviour can be observed and documented.

Corporate investigations. Internal investigations into employee misconduct, theft or policy breaches usually take two to six weeks depending on the number of people involved, the volume of documents to review, and whether digital forensics is required.

What Affects the Duration

Several factors determine how quickly an investigation can be completed:

Quality of starting information. The more you can tell the investigator at the outset, the faster they can work. A trace with a full name, date of birth and last known address will be quicker than one with just a first name and a vague description. A surveillance case where the client knows the subject’s workplace and daily routine can be planned more tightly than one starting from scratch.

Behaviour of the subject. Subjects who follow predictable routines are easier to observe. Those who vary their movements, work irregular hours, or are generally cautious take longer to monitor. In tracing cases, someone who has taken steps to disappear will be harder to find than someone who simply moved house.

Scope of the investigation. A narrow question (“Does this person work at this address?”) can be answered quickly. A broad question (“What is this company really doing?”) requires more time, more sources, and more analysis.

Legal and procedural constraints. Investigations that need to produce court-admissible evidence must follow strict procedures. This adds time but protects the quality of the outcome. Rushing evidence gathering to save time often results in evidence that cannot be used when it matters most.

External factors. Waiting for responses from organisations (Companies House, courts, local authorities), weather conditions affecting surveillance, and the availability of witnesses all affect timelines in ways that are difficult to predict.

Can an Investigation Be Rushed?

Some tasks can be expedited. An urgent people trace can sometimes be completed within hours if the right databases produce a quick match. Emergency surveillance can be arranged at short notice when the situation demands it.

However, rushing an investigation usually means cutting corners, and cutting corners means lower-quality evidence. If the results need to stand up in court, be presented to a solicitor, or support a business decision, it is better to allow enough time for the work to be done properly. A fast result that turns out to be wrong or incomplete is not a result at all.

How Agencies Manage Timelines

A good agency will discuss the expected timeline at the start of the case and keep you updated as work progresses. At UKPI, we provide regular progress reports so clients know what has been done, what has been found, and how much longer the work is expected to take.

If an investigation is taking longer than expected, the agency should explain why and discuss options with you. Sometimes pausing and reassessing is more productive than continuing with the same approach. Other times, a longer timeline reflects the difficulty of the case rather than any failure of method.

What You Should Expect

Before work begins, ask the investigator for an estimated timeline based on what they know. This will not be a guarantee, but it gives you a reasonable expectation to plan around. A professional agency will also explain the factors that could extend the timeline and what would happen to costs if the case runs longer than expected.

To discuss how long your case might take, call UKPI on 0800 043 1754 for a free, confidential assessment.