Once the act of copyright infringement occurs, either by the user or the search engine service provider, in order to impose liability on the primary and secondary infringer, it is essential that the plaintiff acquire material evidence regarding the alleging infringement. In regards of the form of data stored in adwords systems, which is all in digital form, it should be thoroughly scrutinized since it is an important matter in the litigation process. It is unavoidably for lawyers to put much of consideration on acquisition of evidence which are all in electronic form as such evidence shall be their supporting materials to convince the court to impose liability on the person who commit infringement. This section shall provide the information on how electronic evidence is acquired, and how it is admitted to the court.