Following is a list of different types of investigations:
- Accident Investigation
- Arson / Fire Investigation
- Background Investigation
- Child custody cases
- Civil Investigation
- Corporate / Business
- Crime scene investigations
- Criminal
- Fraud Investigation
- Insurance / Insurance Fraud
- Missing Person locates
Following is a list of the different types of services that a private investigator may provide:
- Adoption Inquiries, research, and locates
- Address History and Address Verification
- Adult / Child Abduction (see Missing Persons)
- Asset search and recovery
- Automobile Recovery and repossession
- Bail enforcement
- Bankruptcy verification
- Bug sweeping to identify surveillance technology
- Business Credit Checks
- Civil Litigation Support
- Civil Court Records research and retrieval
- Court records search and retrieval
- Credit History Check
- Criminal defense investigation
- Criminal investigation
- Debtor Locates
- Delivery of Subpoenas, also known as process service
- Digital Video Surveillance
- DNA Lab Testing Services – For determining paternity, infidelity, testing ancestry, kinship, blood/alcohol, personal identification
- DUI or License Suspensions
- Cheating Spouse surveillance
- Collection of Debts
- Computer Forensics and data analysis
- Court Records Search
- Covert Surveillance Operations
- Divorce investigations
- Death Investigation
- Document retrieval
- DMV / Motor Vehicle records search and retrieval
- Employment History
- Executive Protection
- Expert Witness
- Federal records search
- Fugitive recovery
- Federal Criminal Record Search
- Fictitious Name Filings
- Fingerprinting
- Forensic Investigation
- GPS tracking
- Hidden camera surveillance
- Home security
- Homicide investigations
- Identity Theft
- Infidelity Investigations
- Internal theft investigations/loss prevention
- Invasion of Privacy
- Investigate police abuse
- Legal Experts
- Legal Testimony
- Locate missing persons
- Loss Prevention
- Malpractice investigation
- Marriage records
- Missing Person Locates
- Motor Vehicle Report Retrieval
- MVR (Motor Vehicle) Reports
- Mystery Shopper / Secret Shopper
- Night Time Surveillance
- Official Statements / Interviews
- Parental kidnapping
- Patent and trademark infringement
- Personal Injury
- Personal Protection
- Phone Records
- Police Reports
- Polygraph
- Public document retrieval
- Public records search
- Pre-Employee Screening
- Pre-Marital Inquiries
- Property Records Retrieval
- Process Service
- Records Retrieval
- Recovery of Stolen Property
- Research prison records
- Sex Offender Registration
- Sex offender search – locate or investigate
- Sexual Harassment
- Service of Process
- Skip Trace
- Subpoena Service / Process Service
- Subrogation
- Stalking / Anti-Stalking
- State records search
- Surveillance
- Tenant Screening
- Testify in Court
- Trade Secret Violations
- Theft
- UCC Filings
- Unclaimed Property Research
- Undercover
- Vehicle Tracking Systems
- Vendor assessment
- Vessel / Aircraft
- Video Surveillance
- Wiretap detection
- Witness Location and Evidence Preparation
- Witness Interviews and Statements
- Workers Compensation Claims
- Wrongful or Suspicious Death
