Tarheel, The scale must be a certified scale. The state, the IGFA, and some manufacturers can certify scales. Finding someone with certified scales who will allow you to weigh a fish on them might be a problem, most meat departments, etc., won't allow it. A farmer's co-op or someone like that who sells by weight in large amounts would be your best bet. As for witnesses, someone who is familiar with the scale must act as weighmaster and one other person must sign as witnesses. Because I have my own certified scales, I grab anyone nearby or at a ramp. show them how to read them, and have them and anyone else who witnesses the weighing sign the forms, which I carry with me. The paperwork required and all of the rules are available on the International Game Fish Angler's website and can be downloaded for free. I have never caught a Tennessee state record so I'm not sure about all of the hoops to jump through for TWRA, but I did get to be a witness to the catch and weighing of the state record white sucker for a friend. That application info is available on the TWRA website.