Article 44(8) of the Data Protection Act specifically names the website of a controller or a processor as an example about where a controller or a processor shall publish the contact details of the data protection officer.
Guidelines of the Slovak supervisory authority
Slovak Data Protection Authority published a template for the fulfilment of information requirements concerning the employee personal data processing (in Slovak), available at:
https://dataprotection.gov.sk/uoou/sk/content/vzor-informacnej-povinnosti-pre-zamestnanca.
