Can. 1484

§1. Before the procurator and advocate undertake their function, they must present an authentic mandate to the tribunal.

§2. To prevent the extinction of a right, however, the judge can admit a procurator even if the mandate has not been presented, once a suitable guarantee has been furnished if the case warrants it; the act, however, lacks any force if the procurator does not correctly present the mandate within the peremptory time established by the judge.