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When hiring a PI, be sure to inquire about the types of services they provide and ask to see examples of supporting case materials or references to contact.

Following are services a professional private investigator might provide. with links to more information where available.  For a directory of private investigators that provide services of this nature in your area, please visit our Private Investigator Directory.

View also How to become a Private Investigator, Private Investigator training courses

• Accident investigations

• Adoption Inquiries

• Address History and Address Verification

• Adult / Child Abduction (see Missing Persons)

• Arson insurance investigation

• Asset search and recovery

• Automobile Recovery

• Background check, background investigations

• Bail enforcement

• Bugsweeping

• Child custody investigation

• Civil Litigation Support

• Crime scene investigations

• Criminal investigation

• Criminal defense investigation

• Court records search and retrieval

• Civil Investigations

• Debtor Locates

• Delivery of Subpoenas

• Digital Video Surveillance

• DNA Lab Services - For determining paternity, infidelity, testing ancestry, kinship, blood / alcohol, personal identification

• Cheating Spouse

• Collection of Debts

• Computer Forensics

• Corporate Fraud Investigations

• Corporate Investigations

• Court Records Search

• Covert Surveillance Operations

• Criminal Investigations

• Divorce investigations

• Death Investigation

• Document retrieval

• DMV / Motor Vehicle records search and retrieval

• Executive Protection

• Expert Witness

• Federal records search

• Fugitive recovery

• Federal Criminal Record Search

• Fingerprinting

• Forensic Investigation

• Fraud investigations

• GPS tracking

• Hidden camera surveillance

• Home security

• Homicide investigations

• Identity Theft Investigations

• Infidelity Investigations

• Insurance Investigations

• Insurance fraud investigation

• Internal theft investigations / loss prevention

• Investigate police abuse

• Legal Experts

• Legal Testimony

• Locate missing persons

• Loss Prevention

• Malpractice investigation

• Marriage records

• Missing Person Locates

• Motor Vehicle Report Retrieval

• Mystery Shopper / Secret Shopper

• Night Time Surveillance

• Official Statements / Interviews

• Patent and trademark infringement

• Personal Injury Investigations

• Personal Protection

• Phone Records

• Police Reports

• Polygraph

• Public document retrieval

• Public records search

• Pre-Employee Screening

• Pre-Marital Inquiries

• Process Service

• Records Retrieval

• Recovery of Stolen Property

• Research prison records

• Sex offender search - locate or investigate

• Sexual Harassment

• Service of Process

• Skip Trace

• Subpoena Service / Process Service

• Subrogation

• Stalking investigations / Anti-Stalking

• State records search

• Surveillance

• Tenant Screening

• Trade Secret Violations

• Theft

• UCC Filings

• Unclaimed Property Research

• Undercover Investigations

• Vehicle Tracking Systems

• Vendor investigations

• Vessel / Aircraft investigations

• Video Surveillance

• Wiretap detection

• Witness Location & Evidence Preparation

• Witness Interviews and Statements

• Workers Compensation Claims and Investigations

• Wrongful or Suspicious Death Investigations