[MARCIANUS libro secundo de appellationibus. ] §49.6.1.prPost appellationem interpositam litterae dandae sunt ab eo, a quo appellatum est, ad eum, qui de appellatione cogniturus est, siue principem siue quem alium, quas litteras dimissorias siue apostolos appellant. §49.6.1.1Sensus autem litterarum talis est: appellasse puta Lucium Titium a sententia illius, quae inter illos dicta est.
[MARCIANUS, On Appeals, Book II] After an appeal has been interposed, letters must be given by the person from whom the appeal was made to the person who is to take cognizance of the appeal, whether the emperor or someone else; which letters they call "dismissory letters" or "apostoli." Now, the tenor of the letters is as follows: suppose, for instance, that Lucius Titius has appealed from the judgment of that person, which was pronounced between them.
§49.6.1.2Sufficit autem petisse intra tempus dimissorias instanter et saepius, ut et si non accipiat, id ipsum contestetur: nam instantiam petentis dimissorias constitutiones desiderant.
Moreover, it is sufficient to have requested the dismissory letters within the prescribed time, urgently and repeatedly, so that, even if he does not receive them, he may attest that very fact; for the imperial constitutions require diligence on the part of the person requesting dismissory letters.
aequum est igitur, si per eum steterit, qui debebat dare litteras, quo minus det, ne hoc accipienti noceat.
Therefore, if it is due to the person who ought to have given the letters that he did not give them, it is equitable that this should not prejudice the recipient.