Introduction
Choose the correct lawful basis for each processing purpose and avoid defaulting to consent for everything. This guide helps legal and product teams align decisions.
What it means
GDPR defines six lawful bases, and each purpose should map to the most appropriate one.
Consent requires specific standards and can be withdrawn, so it is not always the operationally best basis.
Legitimate interests require a balancing test and clear user expectations.
Switching lawful basis later is risky unless purpose and context justify the change.
Why it matters
Regulators, customers, and automated scanners increasingly treat published policies and live site behavior as one system. Gaps between what you say and what your site does create enforcement and commercial risk.
Fixing issues early is cheaper than retrofitting consent, tag managers, and legal pages after a complaint or failed enterprise security review.
Common mistakes
- Using consent for strictly necessary security logging.
- Claiming legitimate interests without balancing assessment evidence.
- Combining multiple purposes under one vague lawful basis statement.
- Not updating privacy notices after basis changes.
- Relying on bundled consent language across unrelated activities.
Practical checklist
- List each processing purpose separately.
- Assign one primary lawful basis per purpose.
- Document justification and supporting evidence.
- Run legitimate-interest assessments where relevant.
- Ensure UX and controls match selected lawful basis.
- Update privacy disclosures and internal records.
- Set review trigger for new features and data uses.
How GDPRChecker helps
GDPRChecker helps teams turn legal theory into testable controls. Its scanner identifies trackers, third-party calls, and policy mismatches so you can prioritize the highest-risk gaps first.
After changes ship, GDPRChecker runtime monitoring can confirm consent and tag behavior remains aligned over time. That makes compliance less of a one-off audit and more of an operational process.