Libro I · Título I Capítulo X. De las sociedades irregulares y de hecho

Companies that have an unlawful purpose shall be null, even if they are registered. The nullity may be sought in a summary proceeding and before a Judge of First Instance for Civil Matters, by any interested party or by the Public Prosecutor's Office, and shall have as a consequence the dissolution and liquidation of the company.

Companies not registered in the Mercantile Registry, even when they have been held out as such before third parties, have no legal existence and their partners shall be jointly and unlimitedly liable for the corporate obligations.

The omission of the corporate deed and of the prescribed formalities produces absolute nullity. The partners, however, shall be jointly and unlimitedly liable to third parties with whom they have contracted in the name and in the interest of the de facto company.