If a HSP is exposed to terrorist content – formally this means if the competent authority of the country hosting the HSP’s main establishment or the legal representative has issued at least two legally binding removal orders and the HSP has been informed of this – the TCO Regulation explicitly requires measures to be taken to prevent the further dissemination of terrorist content (TCO Regulation, Art. 5.2). Preventive measures are also recommended to demonstrate proactive behaviour. One such measure can be a reporting system that allows users to report suspicious and prohibited content to the HSP. It makes sense to have users specify a category they would assign to the suspicious content. Terrorism should be named as a separate category. This allows employees who process the reports to prioritise and process content suspected of spreading terrorist ideas more quickly. This pre-categorisation can also facilitate the preparation of later transparency reports – more on this in chapter 6.