CPIS, Commercial Investigations LLP
Practice Notes

How to engage a private investigator without tipping off the subject

Discretion begins before the first phone call. A short guide to engaging an investigator while preserving the integrity of the matter.

Philip Tan· Founder · CPIS LLP29 Jun 20254 min read

We decline many matters at intake because the subject already suspects something is wrong. Discretion begins with the client, before the first phone call.

Before you call

  • Use a device the subject does not have access to.
  • Avoid searching investigation-related terms on shared devices or accounts.
  • Do not discuss the matter with mutual friends or family who may be questioned later.
  • Hold off on confronting the subject, confrontation removes options.

During the engagement

  • Communicate with your case handler through the agreed channel only.
  • Maintain your normal routines as far as possible.
  • Avoid changes (locks, accounts, schedules) until the case handler advises.

After the engagement

Decisions made on the back of a completed investigation are best taken with legal advice in parallel. The evidence is one input, the strategy around it is what determines the outcome.

DiscretionEngagementConfidentiality

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