An appeal against conviction challenges the finding of guilt itself and asks the appellate court either to acquit or to order a retrial. An appeal against sentence, in contrast, accepts the finding of guilt but contends that the punishment is excessive, harsh, or unsupported by the circumstances. The two appeals proceed on different arguments and require different evidentiary emphasis.
In an appeal against sentence, the focus is on the gravity of the offence as proved, the character and antecedents of the offender, the absence of aggravating factors, and any mitigating circumstances such as a clean record, family dependence, restitution, or good conduct during the pendency. The appellate court will ordinarily not interfere with the sentence merely because it differs from what the appellate court might have imposed, but it will intervene where the sentence is manifestly excessive.
A single judgment may give rise to both types of appeal, and the memorandum of appeal can be framed to cover both the conviction and the sentence in the alternative. Because the arguments differ, an advocate will decide whether to lead with the grounds on conviction or to focus wholly on the sentence, depending on the strength of the record. Choosing the right appellate strategy is as important as the quality of the written petition.