The GDPR requires controllers to supply data subjects with detailed information about the processing of...

According to Article 13 of the GDPR, when a controller obtains personal data directly from the data subject, the controller must provide the data subject with certain information about the processing of their data, such as the identity and contact details of the controller, the purposes and legal basis of the processing, the recipients or categories of recipients, the period of storage, the rights of the data subject, the right to lodge a complaint, etc. However, the controller does not have to provide the data subject with the categories of personal data concerned, as this information is already known by the data subject, since they provided the data themselves. This is different from Article 14, which applies when the controller obtains personal data from a source other than the data subject, and requires the controller to inform the data subject of the categories of personal data concerned, as well as the source of the data. References:

Art. 13 GDPR - Information to be provided where personal data are collected from the data subject

Art. 14 GDPR - Information to be provided where personal data have not been obtained from the data subject

Article 13: Information to be provided where personal data are collected from the data subject - GDPR