How to Vet a Private Investigator in South Dakota, a State With No PI License

01The licensing gap

South Dakota Has Never Adopted a PI Licensing Law

Many states let you type an investigator's name into a licensing board database. South Dakota offers no such shortcut. A Legislative Research Council issue memorandum lists South Dakota among the states without a statewide private investigator licensing law, and it notes that a 1995 bill, HB 1301, which would have created licensure for private detectives, did not pass. A later attempt, HB 1182 in 2013, was deferred 13 to 0 in the House Commerce and Energy Committee and died. Our South Dakota investigations overview explains how Delator Group works within that gap.

The practical result is that anyone may print business cards and take cases. Some of those people are retired detectives with decades of court experience, and some have neither training nor insurance. Because the state does not screen them, you need to vet a private investigator in South Dakota yourself, or have your lawyer do it. Delator Group is a licensed Tennessee private investigation firm headquartered in Nashville, and it applies that licensing standard in every state where it works, as our company background describes.

• No state PI license or licensing board
• 1995 and 2013 licensing bills both failed
• Confirm any local business requirements yourself

02Rules that still apply

The Criminal Code Still Draws the Lines

No license does not mean no law. Investigators are bound by the same South Dakota Codified Laws as everyone else. SDCL 23A-35A-20 generally makes it a Class 5 felony to record a conversation without the consent of a party to it. SDCL 22-21-1 reaches trespassing to conduct surveillance in a private place and installing devices there without consent. Criminal trespass under SDCL 22-35-6 covers entering posted or fenced property. Our South Dakota recording consent guide covers the first of these in detail.

Stalking under SDCL 22-19A-1 includes repeatedly harassing someone through electronic or digital communication, and the identity theft statute, SDCL 22-40-8, generally covers using another person's identifying information to deceive. An investigator who does not know these provisions can expose you to a criminal referral or a suppressed exhibit. When you interview candidates, ask them to explain each limit in their own words, and compare the answers with our summary of what a South Dakota PI may lawfully do. If a case touches on stalking and harassment investigations, that knowledge matters even more.

03Paperwork to request

Insurance, Tax Registration and Local Requirements

Start with documents, because they are easy to check and hard to fake for long. Ask for a certificate of general liability insurance naming the policy period and carrier, then call the carrier if anything looks off. Secondary industry sources indicate that a South Dakota sales tax license from the Department of Revenue is expected for investigation businesses, so ask whether the firm holds one and confirm current requirements with the department. Firms handling corporate investigations in South Dakota should also explain how they protect client data.

We could not confirm whether Sioux Falls, Rapid City or any other city regulates investigators by ordinance, so do not assume either way. Ask the investigator which local requirements apply where the work will happen, then verify that answer with the city clerk. A careful firm will already know, and a firm that shrugs the question off has told you something useful. If you want our answers in writing, request them through our contact page and we will send them before you commit.

• Certificate of liability insurance
• Sales tax registration status
• Local business requirements, if any

04Contract terms

Get the Scope and Price in Writing Before Work Starts

Open-ended retainers are where clients lose money. A sound agreement names the objective, the hours or days authorized, the hourly rate, any case minimum, mileage, and what the deliverable will be. Delator Group bills investigative work in South Dakota at $100 per hour, the same as Tennessee, and the South Dakota service pricing page lists our case minimums, such as $1,000 for civil litigation support and $1,000 for an asset investigation.

Compare proposals on the same basis. One firm may quote fewer hours but add travel at the end, while another builds the drive from Sioux Falls to the Black Hills into the estimate. Ask each one, including any firm quoting background checks for a new hire, what happens when the authorized hours run out: do they stop and report, or keep going and bill you later. Our guide to private investigator costs in South Dakota walks through the line items that tend to surprise people.

05Work product

Ask for a Report Built for South Dakota Courts

A report is the product you are buying, so ask to see a redacted sample from a similar matter. It should read like evidence: dates, times, locations, who observed what, and photographs or video tied to the log. Most civil and criminal cases here are heard in the circuit courts, organized into seven judicial circuits, while magistrate courts handle small claims up to $12,000 and many misdemeanors. Attorneys who rely on investigative support for South Dakota counsel need reports that fit both settings.

Federal matters go to the U.S. District Court for the District of South Dakota, which sits in Sioux Falls, Rapid City, Pierre and Aberdeen. Ask whether the investigator has testified, how they handle chain of custody for photographs, and whether they will prepare for a deposition. A firm offering surveillance investigations across South Dakota should be able to show you how a surveillance log becomes a court exhibit, and should welcome a question about cross-examination.

06Distance and logistics

Ask How the Investigator Will Cover the Ground

South Dakota is large and thinly settled, and logistics separate competent firms from hopeful ones. Sioux Falls and Rapid City are roughly 349 miles apart on I-90, and the Central to Mountain time line crosses the interstate at the west edge of Jones County. A firm based in one corner of the state may quote work in the other without accounting for the drive. Ask who will actually be in the field, whether for investigators in Rapid City or for Sioux Falls casework.

Winter is the other variable. In December 2022 SDDOT closed I-90 from Rapid City to Chamberlain, then extended the closure to Sioux Falls, during a blizzard. A good investigator plans around closures and says so in writing. Ask, too, how they handle matters on reservation land, which covers over 12 percent of the state; tribal law can govern there, and the right answer is that they confirm the approach with counsel before acting. Central South Dakota work often routes through our Pierre investigators.

07Walk away signals

Red Flags That Should End the Conversation

Some answers disqualify a candidate on the spot. Be wary of anyone who offers to put a GPS tracker on a vehicle you do not own, read a partner's phone, log into an email account, or call a bank pretending to be someone else. South Dakota has no tracker-specific statute, but covert tracking can create stalking, harassment and trespass exposure, and pretexting can run into the identity theft statute. A lawful infidelity investigation never needs any of those shortcuts.

Other warning signs are commercial. Guaranteed outcomes, pressure to pay cash, refusal to put the scope in writing, and a claim to hold a South Dakota PI license all deserve suspicion, since the state does not issue one. So does an investigator who wants to talk about your opposing party's private data instead of your goals. If someone has already exposed your own information, our personal information wipe service can help reduce what is publicly available.

• Offers trackers, phone access or account logins
• Promises a guaranteed result
• Will not put scope and price in writing
• Claims a South Dakota PI license

Services

Delator Group Services You Can Hold to This Standard

• Surveillance investigationsLawful observation from public vantage points, recorded in time-stamped logs and photographs that a South Dakota attorney can lay foundation for in court.Learn more
• Infidelity investigationsDiscreet documentation of suspected affairs without trackers, account access or entry onto private property, reported in plain language you can share with counsel.Learn more
• Employee background checksRecords and open-source research on a South Dakota job candidate, with basic remote checks starting at $102 and deeper reports at $300.Learn more
• Business partner vettingLitigation, lien, entity and reputation research on a prospective South Dakota partner before you sign an operating agreement or wire any capital.Learn more
• Skip tracingLocating people who have moved or gone quiet, from a $102 remote trace to field work starting at $1,000 when records run out.Learn more
• Asset investigationsPublic-record tracing of real property, entities, vehicles and liens for judgments and divorce, with a $1,000 case minimum stated up front.Learn more
• Attorney litigation supportWitness locates, interviews, scene documentation and report writing directed by counsel, with a $1,000 minimum for civil litigation support matters.Learn more
• Investigative consultingA second opinion on another investigator's plan, report or invoice, so you can judge whether the work was done correctly.Learn more
• Process servingDelator Field Services coordinates service under SDCL 15-6-4 with logged attempts, time stamps and a signed affidavit for the court file.Learn more

How it works

A Four-Step Vetting Routine

1. 01

   Collect the documents

   Request an insurance certificate, a redacted sample report, the standard agreement and tax registration status from every candidate, and note how promptly each one responds.

2. 02

   Interview the person doing the work

   Ask who will actually be in the field, what training and background they bring, and how they would gather evidence in your case without breaking South Dakota law.

3. 03

   Call a reference

   Speak with at least one attorney or past client about deadlines, budget discipline, report quality and how the investigator held up when testimony was needed.

4. 04

   Compare written scopes

   Put the written proposals side by side, checking hours, rate, minimums, travel and deliverables, and choose on clarity and method rather than on the smallest number.

Compare

What to Check When There Is No South Dakota License

Statewide coverage

The Same Checks Apply in Every South Dakota County

These steps hold whether your matter is in a growing suburb or a ranch county far from the interstate. East River clients in the Brookings area can start with our Brookings investigator page, and northeastern matters often begin with Aberdeen private investigation. In the northern Black Hills, see our Spearfish investigations page. If you also need papers delivered, the South Dakota process serving hub explains how service is coordinated and documented. Wherever the work sits, ask for the scope and price in writing first.

• Sioux Falls
• Rapid City
• Aberdeen
• Brookings
• Pierre
• Spearfish
• All of South Dakota

FAQ

Frequently asked questions

Every service

Investigations available in South Dakota

Every service below is available in South Dakota and across South Dakota, run by the same Delator Group leadership that manages our Tennessee casework. Choose a service to read how it works in South Dakota.

Service areas

Private investigators across South Dakota