Maryland Private Investigator License Search: Status and Verification

To run a Maryland private investigator license search, go to the Maryland State Police Licensing Portal at licensingportal.mdsp.maryland.gov and search by the investigator’s name, the agency name, or the license number. The portal is maintained by the Licensing Division within the Department of State Police, which regulates private detectives under Title 13 of the Business Occupations and Professions Article.¹ A search takes only a few minutes, and doing it before you hand over a retainer matters: unlicensed detective work is a misdemeanor in Maryland, and evidence gathered by someone without credentials can be challenged in court.

Agency License or Individual Certificate

Maryland issues two different credentials, and knowing which one you are looking for keeps the search from confusing you.

A Private Detective Agency License is the business-level credential. It can be held by an individual operator or a firm, and any agency that plans to employ five or more detectives must carry at least $1,000,000 in liability insurance.²

A Private Detective Certificate is what individual investigators carry. Every certified detective must work under a licensed agency, and the certificate is tied to that specific agency. If the investigator moves to a different firm, a brand-new application is required through the new employer.³

If you hired through a firm, search the agency license. If you want to confirm a specific investigator’s credentials, search the individual certificate. Ideally, check both.

Running the Search

The portal is the same system detectives use to apply and renew, and it includes a public lookup.⁴ You can search by full legal name or by license number. A few things save you from false negatives:

Spelling has to be exact. A missing middle initial or a misspelled surname can return zero results even when the person is fully licensed. Check a business card or an email signature for the exact name before you search.
If a name search turns up nothing or too much, try the agency name. Because certificates are linked to specific agencies, finding the firm often leads you to the detective.
The license number is the fastest and cleanest option. Ask the investigator for it directly if you don’t have it.

When several similar names come back, cross-reference the agency affiliation or location to make sure you are looking at the right record.

What the Status Field Tells You

The status is the field that matters. Both agency licenses and individual certificates run in three-year terms.⁵

Active means current, valid credentials. The holder renewed on schedule and met the continuing requirements. This is the only status you want to see before signing a contract.
Expired means the three-year term ran out without a timely renewal. The investigator cannot legally provide detective services until renewal is complete. Maryland also charges a late fee of $10 per day if renewal paperwork is not received at least 15 days before expiration.⁵
Suspended means the Secretary of State Police has taken temporary enforcement action. Revoked means that action is permanent. Grounds include fraud in obtaining the license, unauthorized practice, false advertising, false statements on renewal paperwork, failing to maintain required liability insurance, and other violations of Title 13. Either way, the person has no authority to work.⁶

When the Portal Returns Nothing

An empty result does not always mean the person is unlicensed. The portal can lag behind recent issuances or renewals, and small data mismatches can hide legitimate records. Before you draw a conclusion, try this:

Vary the terms. Try the agency name instead of the individual, or drop the middle initial. Try alternate spellings.
Contact the Licensing Division directly. They handle verification inquiries by phone and email. Provide the full name, any known agency affiliation, and the license number if you have one. A direct inquiry catches records the portal might miss during a system update.⁴
Ask the investigator. Any legitimate detective will readily share a license number and an agency affiliation. Reluctance is itself a signal.

The Licensing Division processes a high volume of paperwork; verification is faster than new-application review, but give it reasonable turnaround time rather than expecting a same-day answer.⁷

Checking the Certificate Card in Person

Beyond the online lookup, every certified private detective carries a certificate card issued by the state. The card is the property of the State of Maryland and must be returned within five days if the detective is terminated by their agency, surrenders the certification voluntarily, or has it revoked.³ That return rule means a card in hand is a reasonably current sign the holder is still authorized.

When you meet an investigator, ask to see the card. Confirm the name matches the person in front of you and the listed agency matches the firm that is billing you. Because certificates are agency-specific, a card that names a different agency is not valid for the work you are paying for.

Why Getting This Right Matters

Maryland law flatly prohibits anyone from providing, offering, or soliciting private detective services without proper credentials. No person may operate an agency without a license, and no individual may perform investigative work without a certificate. Violating the prohibition is a misdemeanor.⁸

The risks to you as the client run parallel to the investigator’s legal exposure. Evidence gathered by an unlicensed person can be challenged in court, which can undo months of case-building. An unlicensed operator also has no required liability insurance, no surety bond, and no regulator holding them accountable if they damage your interests or violate someone’s privacy.

What to Check Before You Sign

Once the status reads Active, a few more steps protect you before money changes hands. Ask to see proof of liability insurance, especially with a larger firm; agencies employing five or more detectives are required to carry at least $1,000,000 in coverage.²

Any written agreement should include the agency’s license number, the certified detective’s name, a clear description of what services are covered, and terms for returning unused retainer funds. Surveillance work, for example, does not automatically include GPS tracking or social media monitoring unless the contract spells it out. A solid contract also states that the investigator will comply with all state and federal laws and will not use illegal methods such as unauthorized wiretapping, hacking, or trespassing. An agency that resists putting these terms in writing has just told you more than the license search did.

1
Maryland General Assembly. Maryland Code Business Occupations and Professions 13-201
2
Maryland Code of Regulations. COMAR 29.04.08 – Private Detective Agency Licenses and Private Detective Certifications
3
Maryland Department of State Police. Private Detective Certificate
4
Maryland Department of State Police. Licensing Division
5
New York Codes, Rules and Regulations. Maryland Code Business Occupations and Professions 13-308 – Expiration and Renewal of License
6
New York Codes, Rules and Regulations. Maryland Code Business Occupations and Professions 13-313 – Denial, Suspension, or Revocation of License
7
Maryland Department of State Police. a href=”https://mdsp.maryland.gov/firearms-permits-professional-licenses/professional-licenses/private-detective-certificate” target=”_blank” rel=”noopener”>Private Detective Certificate
8
Maryland General Assembly. Maryland Code Business Occupations and Professions 13-701