What indicates that a youth has completed their sentence?

Completion of required community service is a clear indicator that a youth has fulfilled the obligations of their sentence. Community service is often a component of a sentence in a Youth Court setting, aimed at rehabilitating the youth and giving them a chance to contribute positively to the community. When a youth successfully completes this service, it demonstrates that they have adhered to the terms set forth in their sentence.

The other options provide additional context but do not serve as definitive indicators of sentence completion. A final meeting with a judge may occur for various reasons, such as discussing progress, but it does not confirm that the terms of the sentence have been fully met. A letter of apology can be a part of the process but isn't necessarily a requirement across all cases. A summons issued is a legal action that may indicate an upcoming court appearance rather than the completion of any sentence. Hence, the successful completion of community service stands out as the most concrete measure of a youth's adherence to their sentencing requirements.