Under the EU GDPR, data minimisation limits personal data to what is adequate, relevant and necessary for the specified purpose. Collecting more merely because it might become useful later does not automatically meet that principle.[1]
Do not routinely request a birth date for an ordinary parcel order without a necessary reason. Examine free-text fields and exports too: unnecessary information can enter the records through these side channels.
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Compiled with AI assistance using public sources. General explanation, not individual legal or tax advice. Describing a concept does not mean Zoloo offers it as a feature.