In employment litigation, evidence now admitted during most trials routinely includes electronically stored information (ESI), including email communications and documents the receipt of which is often acknowledged with a mouse click. Trial counsel must know how to authenticate such ESI to ensure the court will allow it into evidence. Counsel also should be aware of the pitfalls when ESI has been intentionally or unintentionally altered, thus impairing admissibility. Unfortunately, in addition to hacking and cyberattacks,…