NJ RULES OF EVIDENCE NJRE RULE 1004. ADMISSIBILITY OF OTHER EVIDENCE OF CONTENTS
The original is not required and other evidence of the contents of a writing or photograph is admissible if:
(a) Originals lost or destroyed. All originals are lost or have been destroyed, unless the proponent lost or destroyed them in bad faith; or
(b) Original not obtainable. No original can be obtained by any available judicial process or procedure or by other available means; or
(c) Original in possession of opponent. At a time when an original was under the control of the party against whom offered, that party was put on notice by the pleadings or otherwise that the contents would be a subject of proof at the hearing, and that party does not produce the original at the hearing; or
(d) Collateral matters. The writing or photograph is not closely related to a controlling issue and it would not be expedient to require its production.