1133. The party who claims the fulfilment of an obligation must prove it.
On the other hand he or she who alleges facts in avoidance or extinction of an obligation must prove them; subject nevertheless to the special rules of this Chapter.
1134. The evidence produced must be the best of which the case in its nature is susceptible. This is called primary evidence.
Secondary evidence is inadmissible unless it is shown that the primary cannot be produced.
1135. Evidence is afforded by writing, by testimony, by presumptions, or by the confession of a party, or according to the rules of this Chapter and in the manner provided in the Code of Civil Procedure.
1136. The rules of this Chapter, where such intention may be inferred, apply in commercial affairs as well as others.
1137. Any question relating to evidence, which is not covered by any provision of this Code or of any other statute, must be decided by the rules of evidence as established by the law of England. (Substituted by Act 34 of 1956)