Dear Victim
This organisation can certainly come handy but is generally expensive. All evideces that you have may or may not be contested in court for its authenticity. If the evidence is not contested, there is no need for authenticating the evidence and if in case the point is raised on the autheticity of the evidence then the court would order for investigation. Once the court orders the same....the price charged by the same firm like truth labs would be substantially less. Usually evidence stage is at a very later date, so instead of spending the money now,....you can choose to spend it later and that too a reduced amount.
This is purely on how I have understood it, experts to comment and suggest.