1Ulpianus, On the Edict, Book I. Inquiry should be made from whom it is not lawful to appeal. 1And, indeed, it would be foolish to warn anyone that it is not lawful to appeal from the Emperor, since he himself is the one to whom the appeal is made. 2It should be remembered that an appeal cannot be taken from the Senate to the Emperor; and this was established by an address of the Divine Hadrian. 3If anyone, before judgment has been rendered, should assert that he will not appeal from the decision of the judge, he unquestionably loses the benefit of the appeal. 4Sometimes the Emperor appoints a judge with the understanding that an appeal cannot be taken from his decision; for I know that judges have very frequently been appointed in this manner by the Divine Marcus. Let us see whether anyone else can appoint a judge in this way. I do not think that he can do so.

2Paulus, On Appeals, Book I. The question was asked whether an appeal can be taken against arbitrators, who are appointed for the purpose of accepting sureties. Although several authorities hold that, in this case, even without an appeal, the decision can be amended by the person who rendered it.