On 28 May Hungary’s President signed a new law adopted by parliament on 19 May and whose Article 33 bans legal gender recognition for transgender and intersex people in violation of their human rights. Hungary’s Commissioner for Fundamental Rights must now urgently stop this law by requesting a review by the Constitutional Court. If the Commissioner fails to act quickly, the ban will be a flagrant attack on transgender and intersex people’s rights and will legitimise an increase of attacks and hate crimes against them.