How to Become a Private Detective in Washington

Unarmed Private Investigator

To become a unarmed private investigator in the state of Washington you must apply to and receive an employment offer from a private investigation agency.

The General Requirements to become licensed are the following: 

  • All individual unarmed private investigators must be:
  • Must be at least 18 years old.
  • You must be a United States citizen or resident alien.
  • You must have no criminal convictions that directly relate to your capacity to perform the duties of a private investigator and/or hinders public safety.
  • You must complete the pre-assignment training requirements.

How to Apply

You must submit:

  • A completed Private Investigator License Application.
  • The non-refundable application fee (check or money order payable to the Department of Licensing).  As of 2012 this fee was $200.00.
  • 1 completed fingerprint card.  Electronic finger printing is recommended as there is less of a chance that the prints will be rejected from the state.  
Please note that you will be required to take a 4 hour pre-assignment training course by a licensed instructor.   Linda Montgomery with Linda Montgomery Investigations provides training classes for those wishing to be licensed in the state of Washington.   For more information visit her website at Linda Montgomery Investigations .


Washington State Department of Licensing

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