It is a far from straightforward decision to found a union in a sector in which such an organisation has never existed before. For the most part, trade unions today have a (long) history: it may not be rare for workers to join a union, but it certainly is for them to participate in one’s founding and initial building. It is acutely challenging when the work itself to be organised is not entirely legal; when most of the workers are migrants in very precarious situations, who are regularly arrested and deported; when the legal context overlooks, and contributes to, high levels of violence and exploitation; and when, as if all of this was not enough, those who should be showing solidarity are on the other side, fighting to increase the criminalisation of the workers’ activity.