Skip to content
Preptima
hardDesignScenarioSeniorStaffLead

How do you know what personal data you hold and where it lives, and what makes that map wrong within a month?

6 min readUpdated 2026-08-15Target archetype: Enterprise Captive, Big Tech, Product Startup

Answer

Short answer

A hand-maintained inventory is wrong the week after it is signed off, because new sinks, new fields inside existing payloads and human copies all arrive without a review.

Was this answer helpful?

Likely follow-ups

  • A product team adds a free-text field that users fill with health information. How does your map find out?
  • How do you inventory personal data inside a third-party tool you cannot query?
  • What granularity of inventory does an erasure request need that a breach assessment does not?
  • Your classifier flags a column as personal data and the owning team disagrees. Who decides, and on what basis?

Related questions