Final answer:
A party does not need to always prove the original is unavailable to admit a duplicate, except under certain circumstances.
Step-by-step explanation:
The question is asking whether it is necessary for a party in a legal case to prove that the original document, recording, or photograph cannot be produced in order to admit a duplicate as evidence. Generally, under the rules of evidence, duplicates are admissible to the same extent as the original unless a genuine question is raised about the original's authenticity or the circumstances make it unfair to admit the duplicate in lieu of the original. So, no, a party does not always need to prove the unavailability of the original. There are exceptions to this, for example, if the original is a will or if the document's purpose is closely tied to its physical presence. The context provided from various sources touches upon the importance of document availability and possession, legal access to documents, and the practices surrounding document concealment or reproduction.