Rules on Evidence
Section 4. Original of document. -
(a) The original of the document is one the contents of which are the subject of inquiry.
(b) When a document is in two or more copies executed at or about the same time, with identical contents, all such copies are equally regarded as originals.
(c) When an entry is repeated in the regular course of business, one being copied from another at or near the time of the transaction, all the entries are likewise equally regarded as originals. (3a)
2. Secondary Evidence