1. A complaint on the basis of Regulation (EU) 2016/679 that relates to cross-border processing shall provide the information required in the Form, as set out in the Annex. No additional information shall be required in order for the complaint to be admissible.

2. The supervisory authority with which the complaint was lodged shall establish whether the complaint relates to cross-border processing.

3. The supervisory authority with which the complaint was lodged shall determine the completeness of the information required by the Form within one month.

4. Upon assessment of the completeness of the information required by the Form, the supervisory authority with which the complaint was lodged shall transmit the complaint to the lead supervisory authority.

5. Where the complainant claims confidentiality when submitting a complaint, the complainant shall also submit a non-confidential version of the complaint.

6. The supervisory authority with which a complaint was lodged shall acknowledge receipt of the complaint within one week. This acknowledgement shall be without prejudice to the assessment of admissibility of the complaint pursuant to paragraph 3.