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Principles · 02 Oct 2026 · 7 min read

Data Minimisation & Purpose Limitation

Two quiet principles run through the whole DPDP Act: collect only what you need, use it only for the stated purpose. What they mean and how to apply them.

Two principles thread through the entire DPDP Act, even where they aren't spelled out as headline rules: data minimisation (collect only what you need) and purpose limitation (use it only for the purpose you stated). Get these right and most other obligations get easier.

Minimisation: necessary, not nice-to-have

Consent under the Act is limited to the personal data necessary for the specified purpose. Collecting a phone number 'just in case', or an ID you don't need, isn't covered just because the person ticked a box. Ask for the minimum.

Purpose limitation: say it, then stick to it

You collect for a stated purpose; using the data for a new, unrelated purpose needs a new basis and notice. 'We may use your data to improve our services' is too vague to cover much — be specific, then stay within it.

Why they reduce risk

  • Less data to secure, map, and expose in a breach.
  • Simpler rights and erasure handling.
  • Fewer notice mismatches and consent gaps.
  • Lower penalty surface overall.

How to apply them

  1. Audit every form and field — drop what you don't use.
  2. Tie each field to a specific purpose in your data map.
  3. Set retention per purpose and erase when done.
  4. Review new features and integrations for scope creep.

How DPDP Bridge helps

DPDP Bridge helps you operationalise minimisation and purpose limitation — mapping fields to purposes and enforcing retention so you hold only what you should. Take the free assessment to see exactly where you stand and what to do next.

This article is general information about the DPDP Act and is not legal advice. For guidance specific to your organisation, take the free assessment or speak to our team.

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