What is the Dishonour fee?

Excuse me, could you please elaborate on what exactly is meant by the term 'Dishonour fee'? I've heard it mentioned in the context of cryptocurrency transactions and finance, but I'm not entirely clear on its definition and how it applies in these fields. Is it a penalty fee imposed for some kind of default or non-compliance? Could you provide a more detailed explanation, including any specific scenarios where this fee might be charged?