Canon 1620. A judgement is null with a nullity which cannot be remedied,

1° it was given by a judge who was absolutely non-competent;

2° it was given by a person who has no power to judge in the tribunal in which the case was decided;

3° the judge was compelled by force or grave fear to deliver judgement;

4° the trial took place without the judicial plea mentioned in can. 1501, or was not brought against some party as respondent;

5° it was given between parties of whom at least one has no right to stand before the court;

6° someone acted in another’s name without a lawful mandate;

7° the right of defence was denied to one or other party;

8° the controversy has not been even partially decided.

Sententia vitio insanabilis nullitatis laborat, si:

1° lata est a iudice absolute incompetenti;

2° lata est ab eo, qui careat potestate iudicandi in tribunali in quo causa definita est;

3° iudex vi vel metu gravi coactus sententiam tulit;

4° iudicium factum est sine iudiciali petitione, de qua in can. 1501, vel non institutum fuit adversus aliquam partem conventam;

5° lata est inter partes, quarum altera saltem non habeat personam standi in iudicio;

6° nomine alterius quis egit sine legitimo mandato;

7° ius defensionis alterutri parti denegatum fuit;

8° controversia ne ex parte quidem definita est.