Questione giuridica chiave
Whether the principal appeal lacked a formal declaration of appeal and had to be declared void.
Decisione estratta
The omission did not justify nullity because the intent to appeal was clear from the filing and the respondent suffered no prejudice.
Motivazione estratta
A formal defect does not require nullity when the challenged dispositive parts can be identified without ambiguity and no procedural disadvantage to the other party is shown; strict nullity would amount to excessive formalism.