In this research, we shed light on the testimony as a mean of proof, we studied its essence in one hand, and its governing rules in electronic crimes, and we clarified the categories of electronic crime witnesses, how obliged the witness can be regarding informing about the electronic crime, the justifications of this obligation, its rules, and its essence. At the end of this research, we concluded the necessity of legalizing special regulations regarding testimony in electronic crime so it can be used as a mean of proof to help investigating authoritiesin revealing electronic crime mysteries, punish the perpetrators, and bring them to justice.