Prior to the electronic age and wide use of the internet, the major legally accepted documentation was a written hard copy of information. Today, this has changed. Whether email, texting, recording, or even information from your favorite Social Discussion Site.
If you are using emails or text as documentation, make sure you include the "header" information... ie "To", "From", "Date", "Time"..etc.
For recording or taping, here are two sites that one may want to explore:
Remember, when defending yourself, every piece of factual information, may support your case. However, this same information could be used against you. So do be very careful when you are on the "web".
Related Power Point Presentation: FPLS-Documentation 1 B.ppt